>> jeff: tonight, new clues and questions. wreckage is spotted that may be from malaysian air flight 370. but how did two passengers with stolen passports get through security? seth doane and mark albert report. wall street's bull market turns five years old today as investors celebrate, history says a correction is coming. a new test to diagnose alzheimer's much earlier and with much more accuracy. dr. jon lapook explains. >> and how song birds survive. if you think the winter's been rough, imagine how these guys feel captioning sponsored by cbs this is the "cbs evening news." >> jeff: good evening, everyone, i'm jeff glor with a western edition of the

broadcast. and it's the first potential it is the first potential breakthrough in the search for a plane that's been missing for nearly two days now. the focus is on a stretch of water just south of vietnam on the gulf of thailand. vietnamese crews have spotted this piece of what may be from malaysia air flight 370. ships from 11 different countries are searching for more, including the u.s.s. pinckney. hundreds of families continue the agonizing wait. these parents in indonesia likely lost their 25-year-old son. at the same time, investigators are trying to figure out the real identities of two passengers who boarded with stolen passports. we have two reports this evening beginning with seth doane in beijing. >> reporter: malaysian officials say they are reviewing radar that indicates flight 370 may have turned back toward malaysia just before losing contact with controllers. >> it was definitely to establish what exactly has happened.

>> reporter: rescuers in the air and on the water continue to search the maritime border between malaysia and vietnam. today this object was discovered in the same area where a search plane spotted two oil-slicks yesterday. mark rosenkerr is a former chairman of the n.t.s.b. and is cbs news contributor. >> they're looking for any signs of a debris field, any pieces that might be part of the aircraft. once they find that, they'll have a better opportunity of pinpointing where the real location of the wreckage would be. >> investigators in malaysia are reviewing security camera footage of the kuala lumpour airport and paying close attention to two passengers who were flying with stolen passports. both tickets were purchased through a code share with china southern airlines and were sequential which may indicate the passengers were traveling together. u.s. officials told cbs news they had so far made no links to terrorism.

interpol is also investigating more suspect passports that could have been used to board the missing plane. two-thirds of the passengers are chinese. and at a beijing hotel where family members were waiting malaysia airlines said they should prepare for the worst. my heart is hanging, the sister of a passenger told us. >> how difficult can it be. why can't they find the plane, she asks. science and technology are so developed. how can a thing as large as a plane just be missing. i feel at a loss. i am feeling terrible. >> reporter: today the family of american passenger philip wood issued this statement. though our hearts are hurting, we know so many families around the world are affected just as much as us by this terrible tragedy. we ask for your prayers not only for ourselves, but for all involved during this difficult time. >> reporter: jeff, malaysia airlines has started to fly the

passengers' family members from here in beijing to malaysia as this search for flight 370 continues. >> jeff: seth doane, thank you very much. those stolen passports that seth mentioned shine a light on a major vulnerable on airline security. the failure to screen hundreds of millions of international passenger force fraudulent or lost documents. checking a passport is as easy as pressing a button or picking up the phone, yet most countries don't. here's mark albert. >> reporter: it's a global clearinghouse for stolen or lost passports. a database run by interpol with more than 40 million travel documents. but of the one billion people who fly internationally each year, four out of every ten, a full 40% are never checked against it to see if they are traveling on false documents. even though the database costs nothing to access. 166 countries contribute information to the database, nearly tripling it's size in the past seven years. but the vast majority don't routinely use it. >> this is not a complicated

system in terms of accessing the data. what you have to have is some capital and resources put to this and then they have to use it. >> reporter: cbs news security analyst juan zarate thinks not checking incoming passengers into the interpol database is a weakness in airline security. malaysia had access to the database, yet the manifest wasn't checked. >> there is no question that the international system, the aviation security system has to get better. no question the united states many ways, but the rest of the secretary-general has has become the gold standard in many ways, but the rest of the world has to catch up. >> reporter: interpol secretary- general has criticized the lack of widespread use of the agency's stolen and lost travel documents database by most countries. telling a security summit last month, quote, only a handful of countries are systemically using s.l.t.d. to screen travelers.

the result is a major gap in our global security apparatus that has left vulnerable to exploitation by criminals and terrorists. >> ( translated ): interpol says about 60,000 inquiries a year match a lost or stolen passport in the database, it is now working on a system that would allow airlines to prevent someone from using its stolen passport number from even booking a ticket. jeff? >> jeff: mark albert, thank you very much. we learned today that ukraine's prime minister will meet president obama wednesday at the white house. also today, russian president vladimir putin defended the drive to separate crimea from ukraine. he spoke with german and french leaders. in crimea itself, putin's forces are doubling down. elizabeth palmer is. >> reporter: part demonstration, part celebration. the crimeans who turned out today at a rally in the capitol believe they are on the winning side. that is, russia's. sergei aksyanov who became prime

minister ten days ago under dubious circumstances told the crowd, "we will overcome all obstacles to restore historical justice." next weekend these people hope a referendum will deliver crimea into the kremlin's hands. meanwhile russian forces are tightening their grip, working hand-in-hand with the self- proclaimed crimean defense force newly inaugurated. armed men in various uniforms continue to besiege ukrainian military bases while on the ukrainian border which was unmarked until yesterday, they have dug holes and, say witnesses, laid landmines. of course not everyone wants crimea to join russia. crimeans with who want to stay in ukraine are demonstrating too but their rallies aren't nearly as big or as bold. pavel nikonov a young professional who is pro russian admits opinion is differently split. >> this action divided us. >> reporter: it's an emotional issue, says pavel but there is a

practical reason to join moscow too. >> people think that if you join russia their salary would get better, their military would be better equipped. they would just generally have a better standard of living. >> i think, yes, russian people- live more, more rich. >> reporter: there's no doubt crimea is poor. it was badly neglected under successive corrupt ukrainian governments. but russian rule may not be the answer. no matter how badly some want it, especially as the result of an armed invasion. elizabeth palmer, cbs news, crimea. >> jeff: here at home a senate panel holds a hearing tuesday questioning the firings of two nuclear whistle-blowers. they raised safety concerns about plans to clean up the handford nuclear waste plant in washington state, where another radioactive leak was confirmed last week. here's carter evans. >> reporter: for more than a year cbs news has followed

walter tamosaitis and donna busche, two high level managers who uncovered major design flaws at the handford waste treatment plant which they say could lead to a radioactive explosion. >> nuclear waste would go into the ventilation system in the buildings, and if the explosion was severe enough, would be released to the public. it would be very similar to the explosions you saw at fukushima. >> that's how bad this could be. >> that's how bad it could be. >> reporter: walter tamosaitis was fired last october. >> you think it was retaliation? >> retaliation, clear retaliation. >> it sent a resounding message to me. >> reporter: and you feel are you next to go. >> absolutely, i do. >> reporter: she was right, donna bushe was fired last month. >> summarily removing me from the project sends a clear and present message to the employees that if you speak up if you stand up, you will be terminated. >> these were top employees with many degrees, that were valued until they raised concerns.

tom carepenter with the watchdog group handford challenge. >> these issues were so severe that eventually the secretary of energy suspended all work in the nuclear facilities at the waste treatment plant. >> reporter: construction on a key part of the waste treatment facility won't resume until the problems raised by tamosaitis and busche are resolved. >> they were delivering a message that was impacting the schedule of the company and therefore the profits of the companies. >> reporter: carpenter will accompany the whistle-blowers to a senate hearing on tuesday where the two main contractors on the project, bechtel national and u.l.s. had been ordered to testify. both companies have told cbs news the firings were personnel matters and have nothing to do with any safety concerns. carter evans, cbs news, los angeles. >> jeff: today's the fifth anniversary of the start of the bull market on wall street. the low point on march 9, 2009, the s&p 500 is up 175% or nearly, that means if you had 100,000 in an s&p index fund your total return today would be nearly $309,000.

for more we're joined by jack otter, the editor of baron's.com. the stock market has only had five bull runs this long. what went into this one? >> well, first of all, just as what goes up must come down, it works the other way too. generally if the stock market in the u.s. loses more than half, you have probably got a bull market around the corner. but the federal government was leaving nothing to chance. first of all there is the stimulus program, more importantly, the federal reserve buying trillions of dollars worth of bonds and keeping interest rates at rock-bottom level. in fact, the economy in the u.s. may not seem so great to a lot of people but we're doing a lot better here than they are in europe or japan. the danger is that we might be on a sugar high. >> jeff: typically on average we have a correction which say dropback of 10% or more every 161 days. it's now been more than 600 days, what does that tell you? >> well, it certainly sounds look a correction might be overdue. the interesting thing in this bull market run is that for the first four years, as stocks were

going up, individual investors continued to sell. they pulled $380 billion out of mutual funds and didn't start getting back in until 2013. so the danger here is that should we have a correction, those latecomers to the market could end up selling at a loss, so once again, buying high, selling low. >> jeff: nobody knows exactly what is going to happen next. but if history is any guide. >> well, the danger is that people take the recent past and extrapolate that into the future. instead, figure we're probably not going to have an uninterrupted 175% rise in the s&p 500. we probably will have more volatility. so don't get complacent. don't think because things have been good they will keep on being good. instead, follow warren buffet, buy fear, sell greed. ve jeff: jack otter, thank you very much. >> pleasure. >> jeff: in anaheim, california, a stage collapse brought a high school musical to a crashing halt last night. take a look, about 200 girls from rosary high were dancing and singing when the front of the stage suddenly buckled. performers were sent tumbling down. 25 students were sent to the hospital, mostly with minor

injuries. a few did have broken bones. dr. jon lapook explains a new blood test that can detect alzheimer's earlier. and seven overtimes later, the hockey game that would not end. those stories when the "cbs evening news" continues. i tried depend last weekend. it really made the difference between a morning around the house and getting a little exercise. unlike the bargain brand, depend gives you new fit-flex®, our best protection. it's a smooth and comfortable fit with more lycra strands. get your free sample at depend.com. [ sniffles ] i have a big meeting when we land, but i am so stuffed up, i can't rest. [ male announcer ] truth is, nyquil cold and flu liquid gels don't unstuff your nose. they don't? [ male announcer ] nope. they don't have a decongestant. really? [ male announcer ] really. alka seltzer plus night fights your worst cold symptoms, plus has a fast-acting decongestant to relieve your stuffy nose. [ inhales deeply ] alka seltzer plus. oh. what a relief it is.

[ male announcer ] can't find theraflu, try alka seltzer plus for fast liquid cold and flu relief. [ male announcer ] can't find theraflu, ...return on investment wall isn't a street... isn't the only return i'm looking forward to... for some, every dollar is earned with sweat, sacrifice, courage. which is why usaa is honored to help our members with everything from investing for retirement to saving for college. our commitment to current and former military members and their families is without equal. [ alarm sound for malfunctioning printer ] [ male announcer ] you've reached the age where you've learned a thing or two. [ metal clanks ]

♪ this is the age of knowing what you're made of. so why let erectile dysfunction get in your way? [ gears whirring ] talk to your doctor about viagra. 20 million men already have. ask your doctor if your heart is healthy enough for sex. do not take viagra if you take nitrates for chest pain; it may cause an unsafe drop in blood pressure. side effects include headache, flushing, upset stomach, and abnormal vision. to avoid long-term injury, seek immediate medical help for an erection lasting more than four hours. stop taking viagra and call your doctor right away if you experience a sudden decrease or loss in vision or hearing. [ cellphone beeps ] this is the age of taking action. viagra. talk to your doctor. this is the age of taking action. this is a map of the pressure points on my feet. i have flat feet. i learned where the stress was at the dr.scholl's foot mapping center. then i got my number, which matched the custom fit orthotic inserts with the right support. find your closest foot mapping center at drscholls.com. i'm a believer.

>> jeff: there is new hope tonight in the fight against alzheimer's, a blood test that could allow researchers to predict with 90% accuracy if a healthy person will develop alzheimer's within three years. that could lead to new treatments at earlier stages. our chief medical correspondent dr. jon lapook is with us. this comes from the journal of nature medicine. we know there is no cure for alzheimer's, researches want to know as early as possible if someone might get it right? >> right, and the reason is people say why do you want to know if you can't do anything about it. the reason is the thinking now is that run of the reasons why the medicine we are giving have

not been successful is we are giving them too late it is like getting lipitor after your fifth heart attack in heart failure too, little, too late. the thinking is if we give it way early in the preventive stage, maybe it will be more effective. >> jeff: this is a blood test. what has been done so far to diagnose. >> well, there have been scans, functional m.r.i. there have been test of spinal fluid and even blood but none have been accurate enough to say okay we're going to use this as a way of predicting if somebody will get alzheimer's. >> jeff: what is different about this particular test? >> okay so, what they did was they looked at more than 500 patients who were 70 and older. and they followed them for five years. and after three years, they took part of that group and they divided them into two groups. one were people who had started off normal and stayed normal. and those, were other people who started off normal and developed alzheimer's or dementia. and then they looked at the blood of both groups. they looked at like 4500 different molecules. and of those they picked about

ten lipids, lipids are fats that are in the bloodstream, and they were able to come up with a panel of ten that helped fingerprint that helped to say this is kind of characteristic of somebody who will get alzheimer's, that's fine. now the question is, does it predict somebody who is normal who is going to go on to get alzheimer's? so they had another group of people, their blood was still frozen. they hadn't looked at them yet and they examined that group. and it turns out that they were able to pick out nine of ten people who started off normal and developed dementia or alzheimer's. now the big question is what about false positives, people who were normal and ended up having a positive test. in that they found that two out of 20 people who were actually normal tested positive is so you don't want to have that. that is called a false positive there is a lot more work to do. these are early stages and dr. fedorov from the university of georgetown school of medicine told me they're going to be doing other types of refinements, maybe adding genetic material in there, it is hopeful you about needs to be replicated, very exciting research.

>> jeff: up next, when small plane and parachutists meet. she loves a lot of the same things you do. it's what you love about her. but your erectile dysfunction - that could be a question of blood flow. cialis tadalafil for daily use helps you be ready anytime the moment's right. you can be more confident in your ability to be ready. and the same cialis is the only daily ed tablet approved to treat ed and symptoms of bph, like needing to go frequently or urgently. tell your doctor about all your medical conditions and medications, and ask if your heart is healthy enough for sexual activity.

do not take cialis if you take nitrates for chest pain, as this may cause an unsafe drop in blood pressure. do not drink alcohol in excess with cialis. side effects may include headache, upset stomach, delayed backache or muscle ache. to avoid long-term injury, seek immediate medical help for an erection lasting more than 4 hours. if you have any sudden decrease or loss in hearing or vision, or if you have any allergic reactions such as rash, hives, swelling of the lips, tongue or throat, or difficulty breathing or swallowing, stop taking cialis and get medical help right away. ask your doctor about cialis for daily use and a 30-tablet free trial. you know how painful heartburn can be. for fast, long lasting relief, use doctor recommended gaviscon®. only gaviscon® forms a protective barrier that helps block stomach acid from splashing up- relieving the pain quickly. try fast, long lasting gaviscon®. my sinuses are acting up and i've got this runny nose. i better take something. truth is, sudafed pe pressure and pain won't treat all of your symptoms. really? alka seltzer plus severe sinus fights your tough sinus symptoms plus your runny nose.

oh what a relief it is [ male announcer ] your eyes. even at a distance of 10 miles... the length of 146 football fields... they can see the light of a single candle. your eyes are amazing. look after them with centrum silver. multivitamins with lutein and vitamins a, c, and e to support healthy eyes and packed with key nutrients to support your heart and brain, too. centrum silver. for the most amazing parts of you. >> jeff: a marathon hockey game

ended in a frozen tie. a high school championship between sylvania north you and st. ignatius lasted four and a half hours with seven overtime periods. before the 8th the opposing coaches and administrators agreed the players were exhausted and at risk of injury. the game ended in a 1-1 tie with both teams sharing the title. federal investigators are trying to figure out how a plane got tangled up with a skydivers parachute causing a wild crash that was caught on camera near tampa. the skydiver was about to land when he sailed into the path of a low-flying cessna, piloted by an 87-year-old world war ii veteran. the plane ripped the parachute's strings before nose-diving into the ground. both men escaped with just bruises. >> 60 years ago tonight, edward r. murrow aired a piece of television history. "see it now" examined the methods of senator joe mccarthy. using mccarthy's own words, the

broadcast documented his abusive conduct of senate hearings into alleged communist subversion. murrow's onscreen summation helped bring mccarthy down. >> the actions of the junior senator from wisconsin have caused alarm and dismay amongst our allies abroad and given considerable comfort to our enemies. and whose fault is that? not really his. he didn't create this situation of fear. he merely exploited it. and rather successfully. cassius was right, the fault dear brutus is not in our stars but in ourselves. good night. and good luck. >> jeff: there is still more ahead for us here. song birds in winter, how they survive to sing another day. way to get your fiber. try phillips fiber good gummies. they're delicious, and a good source of fiber to help support regularity. wife: mmmm husband: these are good! marge: the tasty side of fiber. from phillips.

but with less energy, moodiness, and a low sex drive, i had to do something. i saw my doctor. a blood test showed it was low testosterone, not age. we talked about axiron the only underarm low t treatment that can restore t levels to normal in about two weeks in most men. axiron is not for use in women or anyone younger than 18 or men with prostate or breast cancer. women, especially those who are or who may become pregnant, and children should avoid contact where axiron is applied as unexpected signs of puberty in children or changes in body hair or increased acne in women may occur. report these symptoms to your doctor. tell your doctor about all medical conditions and medications. serious side effects could include increased risk of prostate cancer, worsening prostate symptoms, decreased sperm count, ankle, feet or body swelling, enlarged or painful breasts, problems breathing while sleeping and blood clots in the legs. common side effects include skin redness or irritation where applied, increased red blood cell count, headache, diarrhea, vomiting, and increase in psa. ask your doctor about axiron.

so i tried depend and it made the difference between hearing about my daughter's gym meet, and being there. yeah! nailed it! unlike the bargain brand, depend gives you new fit-flex®, our best protection. it's a smooth and comfortable fit with more lycra strands. hi sweetie! get your free sample at depend.com.

>> jeff: finally tonight, with just 11 days of went tore go the snow is finally in retreat. that dark red in the mid- atlantic shows there were at least two inches of snow has melted in just the past day. as people start venturing out they're being greeted by a sound they haven't heard for months, the singing of birds, don dahler and how america's thrushes, wax wings and worblers make it through the winter. >> as the snow-melts in new york's central park, the birds sing a song of spring. robert decandido known as birding bob has a ph.d in evolutionary ecology. >> is this kind of cold, harsh winter more difficult for birds? >> it is. it can be, if there's enough

food around the cold weather doesn't bother the birds, it's when there is cold weather and little or no food that it's a big problem for birds. >> small birds can lose up to 10% of their body weight each night. so they have to eat a lot during the day. little has been known about how these small birds survive the cold until now. researchers at the university of oxford put microchips on over 2,000 song birds to see exactly how they spend their winter days. what they found was every morning birds leave their nests and scout out food sources. but they don't immediately eat. instead, they fast. staying light and nimble enough to avoid being someone else's lunch. then in the late afternoon, the birds return to where they saw food and chow down. >> how do most of these song birds stay warm if they're to the going to migrate? >> you can shiver, you can burn fat, the birds will do that as well. but they also have down coats. you know how we have down coats that are stuffed with feathers,

they have their own down coats. >> and as for their singing, you weren't mistaken. song bird does go quiet in winter. saving their energy until these warmer days. when their thoughts turn from survival to love. don dahler, cbs news, new york. >> jeff: that is the "cbs evening news" tonight. later on cbs, 60 minutes. i'm jeff glor, cbs news in new york. scott pelley will be here tomorrow. good night. nsored by cbs captioning sponsored by cbs media access group at wgbh access.w captioned by media access group at wgbh access.wgbh.org

pursuit takes officers thro4 bay area counties. rapid progress on the bart extension to san jose. you y be surprised how far ahead schedule crew are right now. a right of passage for many girls. the bay area community making the prom accessible-- for those who y not be able to afford it. kpix 5 news is next. a police pursuit through 4 y area counties ends in the s ,,,,,,

shooting of a san francisco officer. good evening, i'm ann notarangelo. and i'm brian hackney. a police pursuit. ending in three people being detained in the shooting of a police officer. good evening,. a police chase all over the bay area ended with the arrest of a suspect in the shooting of a san francisco