[female narrator] paralyzed veterans of america helping veterans secure their benefits and rebuild their lives. you can help. visit p-v-a dot org. on alert. one year after the raid that killed osama bin laden, al qaeda al qaeda gears up for revenge. in hiding. a chinese legal activist who escaped from house arrest is believed to be taking refuge in the u.s. embassy. and white house humor. president obama tries for laughs at the expense of mitt romney at the annual white house correspondents' dinner. >> we also both have degrees from harvard. i have one. he has two. what a snob. this is the "cbs morning news" for monday, april 30, 2012.

good morning. thanks for joining us. i'm michelle miller. it was one year ago this week, u.s. special forces raided bin laden's secret compound in pakistan and killed the al qaeda leader. al qaeda is weaker but remain a threat to americans and u.s. interests and the raid has become a political issue in this year's presidential campaign. tara mergener is in washington with more. good morning. >> reporter: good morning. this anniversary is quickly becoming a controversial campaign issue. this as americans are warned to be on guard while officials track down leads. the fbi and homeland security department warns, americans need to be on alert ahead of wednesday's one-year anniversary of osama bin laden's death. >> we don't see any active plots under way but we are maintaining our guard. >> reporter: counterterrorism advisers admit al qaeda likely wants payback for killing of its

leader but theycy the group is no longer capable of carrying out september 11th type attacks. the anniversary of osama bin laden's death comes in the middle of the presidential campaign. republicans argue democrats are trying to use it for political gain. the obama campaign released this web video questioning whether likely republican nominee mitt romney would have made the decision to raid bin laden's compound in pakistan. >> he took the harder and the more honorable path, and the one that produced, in my opinion, the best result. >> reporter: republicans say the video crosses the line. >> it's something that was a unifying event for all americans. and he's managed to turn it into a divisive, partisan, political attack. >> reporter: president obama's campaign says the ad is fair game. >> and osama bin laden no longer walks on this planet today because of that brave decision and the brave actions by the men and women in our military.

quite frankly, mitt romney said it was a foolish thing to do a few years ago. >> reporter: but both candidates agree, more still needs to be done to prevent any future attacks. now, of greatest concern to u.s. officials is al qaeda's yemeni affiliate and master bomb maker. >> tara mergener in washington, thank you. here in new york, police are trying to determine what caused a van to flip off a highway overpass, killing all seven people on board. the van crossed three lanes of traffic before flying over a four-foot guardrail and falling more than 50 feet yesterday afternoon. it landed in a wooded area of the bronx zoo that's not open to the public. the van landed upside down and was crushed. >> the injuries were quite horrific. in 30 years i've seen something like this once or twice. everybody was taken aback by it. >> police say the victims were

wearing their seat belts. all were members of the same family, including three children. no one on the ground was hurt. police say speed may have been a factor. the bodies of three crew members killed in a yacht racing crash have been found off the pacific coast. a fourth sailor remain missing. the 37-foot aegean was taking part in a 125-mile race from newport beach, california, to ensenada, mexico. debris from the yacht was first recovered saturday. seven cruise said it looked like had it been through a blender. race officials say it must have collided with a much larger ship like a freighter or tanker. the united states won't say if it's harboring an escaped chinese activists in its beijing embassy. chen gaung chang escaped from house arrest eight days ago. he was driven away by supporters and eventually made his way to beijing. several of his supporters have been arrested and his

whereabouts of his family is not known. chen's escape and presumed u.s. involvement is presumed to complicate high level talks between u.s. and china. secretary of state hillary clinton and treasury secretary tim geithner are due in beijing for critical military, strategic and economic talks. whit johnson reports. >> reporter: following reports the chinese dissident has taken refuge in chinese embassy in beijing, victoria nuland remained firm. >> i don't have anything for you on that. >> nothing at all? >> nothing at all. >> reporter: the case is extremely sensitive ahead of the annual meeting between the u.s. and china. secretary of state hillary clinton and treasury secretary tim geithner are expected to begin talks thursday, centering on trade, the economy and nuclear tensions with north korea and iran. chen will be the elegaphant in e room and some have departed early to negotiate his faith. >> we're going to make sure we

do this in the appropriate way. >> reporter: john brennan stressed the importance of improving chinese/u.s. relations. >> i'm not going to address mr. chen right now. we're working closely with the & individuals involved in this, so i'm going to leave it to others in the u.s. government who have responsibility for it. >> reporter: negotiating chen's release will be difficult for both countries, with the administration hoping to avoid accusations of caving on human rights and the chinese fearing too many concessions may embolden other activists. >> i think that the u.s. is not in a position to require that the chinese treat him well if he leaves the u.s. embassy. the best we can hope for is to negotiate safe passage to the airport and exit from the country. >> reporter: there may be some incentive on both sides for a quiet resolution. if not only a presidential election year here in the u.s., but china's communist party is expecting a leadership transition around the same time. whit johnson, cbs news, the

white house. the head of the u.n. observer mission in syria says it's up to syrians to stop the blood shed that's killed more than 9,000 people there. general robert mood arrived in damascus yesterday. activists say two bombs detonated at syrian security headquarters today, killed more than 20 people. a cease-fire was supposed to go into effect april 12th. coming up next, apple's secret to paying lower taxes. plus president obama cracks up the crowd at this weekend's white house correspondents' dinner. we'll have the highlights. this is the "cbs morning news." i'm a coach. , but when i was diagnosed with prostate cancer... i needed a coach. our doctor was great, but with so many tough decisions i felt lost. unitedhealthcare offered us a specially trained rn who helped us weigh and understand all our options. for me cancer was as scary as a fastball is to some of these kids. but my coach had hit that pitch before. turning data into useful answers. we're 78,000 people looking out for 70 million americans.

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as we count down to the presidential election over the next six months, we will certainly hear plenty of serious messages and political rhetoric coming from leaders in washington. but on saturday night the nation's capital turned into celebrity central at the annual white house correspondents dinner. president obama sevening as roast master general, so to speak. the stars of hollywood and washington, d.c. came together for what is one of the most talked about events in the nation's capital every year. and as expected, president obama's remarks were more "saturday night live" than state of the union. he took frequent jabs at republicans. >> what's the difference between a hockey mom and a pit bull. a pit bull is delicious. i want to especially thank all the members who took a break from their exhausting schedule of not passing any laws to be here tonight.

>> the president took aim at his likely poebt in the general election, mitt romney, while also poking some fun at himself. >> anyway, it's great to be here this evening in the vast, magnificent hilton ball room, or what mitt romney would call a little fixer upper. he and i actually have a lot in common. we both think of our wives as our better halves. and polls show to an alarming insulting extent, the american people agree. >> and he even joked about the ongoing secret service scandal. >> in fact, i had a lot more material prepared, but i have to get the secret service home in time for their new curfew. >> they didn't look like they liked that too much. all jokes aside, the president used has time on the podium to pay tribute to journalist marie colvin and anthony shadid, who

died covering syria. on the "cbs moneywatch," how apple avoids paying millions in taxes and gas prices sink lower. ashley morrison's here in new york with more. >> good morning, michelle. markets overseas got a boost. hong kong's hang seng gained more than 1.5%. tokyo's nikkei is closed for a holiday. this week we'll get the april jobs report. investors are hoping to see an improvement over the march unemployment numbers but analysts believe the unemployment rate will remain unchanged. on wall street stocks bounced back last week. the dow regained all of its losses for april, adding 199 points over the week while the nasdaq gained 69. gas prices continue their downward trickle. according to aaa the cost of a gallon of regular fell a nickel this week. the national average is $3.8 2, about nine cents lower than the same price a year ago.

apple's profits may be through the roof but the company's tax bill hasn't changed much. according to a report in "the new york times," apple uses subsidiaries in low tax nations to keep its taxes lower. methods are legal and may have saved apple as much as $2.4 billion last year. and at the box office, make it two in a row for "think like a man." the comedy was the number one movie in america for the second straight week. it made $18 million, raising is domestic total to nearly $61 million. but the big winner this weekend was the comic book sequel "the avengers." it made more than $178 million overseas. it opens here in the u.s. this friday. i don't know, michelle, i think that "think like a man" might be a funny one for us to see. >> both are on my list. must see. ashley mother on here in new york. thanks for joining us. straight ahead, your monday morning weather. in sports, playoff pressure. the l.a. clippers make an

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here another look at today's forecast in some cities around the country. new york, partly sunny, 65. miami, rain, 82. chicago, thunderstorms, 65. dallas, partly sunny, 83. l.a., partly cloudy and 72. now for a check of your national forecast. showers and thunderstorms will stretch from the great lakes to the ohio valley with damaging

wind and large hail in some areas. a few thunderstorms could pop up across the south with southern florida getting as much as 3 inches of rain. the sun will linger over most of new england and it will be windy from the northwest to northern colorado. in sports, the l.a. clippers stun memphis in game one of the western conference series at one point. the grizzlies were on top by 24, but the clippers took the lead on chris paul's free throws with just 23 seconds left in the game. the clippers mustled the grizzlies 99-98. an ugly night for the celtics against the hawks after a rumble on the floor in the fourth. boston's rondo was tossed for bumping an official. the hawks roll past boston to take game one. in other first-round action, lakers knocked down the nuggets 103-88. the san antonio spurs waltzed over the utah jazz 106-91.

in hockey, the coyotes take a commander lead over the predators in the western conference semis. second period -- in the second period, phoenix scored three times on 19 shots. after a face-off in the third, shane doan powers one in. phoenix over nashville 5-3 for a 2-0 series lead. in game one of the eastern conference semifinals, danny briere's slap shot in overtime puts the flyers over the new jersey devils 4-3. in baseball, tampa bay beat the rangers at home and the rays do it on the strong left arm of david price. he strikes out six. tampa bay over texas 5-2. when we come back, a wake-up call for young diabetes patients. why treating the disease in children is a lot more difficult. [ female announcer ] style is long lasting when hair is nourished

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67. atlanta, mostly sunny, 88. st. louis, rain, 79. denver, partly sunny, 75. seattle, occasional rain at 57. here's another look at this morning's top stories. wednesday marks the one-year anniversary of the raid that killed osama bin laden. white house officials say there is no sign of a specific al qaeda revenge plot but al qaeda is still trying to attack american interests. and it's presumed a chinese legal activists is hiding out in the u.s. embassy in beijing. activists say china and the u.s. are trying to resolve the issue before secretary of state clinton's visit later this week. a disease that normally attacks adults is now being found in the young. it's type 2 diabetes. a new report says doctors are seeing a dramatic increase, especially in overweight teens. and as tony it's also harder to

treat. >> reporter: type 2 diabetic was never seen in young children 15 years ago. doctors know a major risk factory is obesity. >> very little is known about the right way to both prevent it and to treat it. >> reporter: a new study in "the new england journal of medicine" finds standard treatment for type 2 diabetes in children is ineffective because the commonly prescribed drug metformin has a high failure rate in children. but a combination of two diabetes drugs is far more effective in treating children. >> two drugs right off the bat. that's an important finding. >> no added sugars -- >> reporter: important because type 2 diabetes appears to be more aggressive in young people between the ages of 10 and 17. putting them at great risk for life-threatening illnesses

typically associated with. >> we them to grow up and have healthy lives and not be having heart attacks and strokes at terribly young ages. >> how has it been working out? >> good. >> that wasn't a good good. >> reporter: when it comes to preventing type 2 diabetes, more exercise and a healthier diet are key, but doctors know young people's habits are tough to change. >> the first surprise we saw was, number one, how incredibly difficult it was to effect lifestyle change in these children. >> reporter: extremely difficult as well to get children to take any medicine, let alone two drugs. spotlighting the oldest proof in medicine, better not to get the disease than to have to treat it. tony guida, cbs news, new york. a cdc study says one-third of workers in the u.s. are sleep deprived getting fewer than six hours a night. half of the people working overnight say they're not getting enough shut eye.

coming up after your local news on "cbs morning news," singer/songwriter neil sedaka. this is the "cbs morning news." [ female announcer ] ready for a taste of what's hot? check out the latest collection of snacks from lean cuisine. creamy spinach artichoke dip, crispy garlic chicken spring rolls. they're this season's must-have accessory. lean cuisine. be culinary chic. people will have doubts about taking aspirin for pain.

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. good morning. welcome to 9news now. today is monday, april 30, the last day of this month. i'm andrea roane. thanks for joining us. i'm mike hydeck. happy monday. hello, monika santami.

>> good morning. >> she has traffic momentarily. >> howard bernstein. >> good morning. everyone came to maryland sunday. a great day. it's cool this morning. temperatures are down in the 40s and 50s. you'll start with a light jacket i believe. 51 in d.c. by noon 60. yes, we'll be partly to mostly cloudy. lots of high clouds. i don't think we'll see much more than maybe one sprinkle here or there with 5:00 p.m. temperature 67. some spots near 70. other spots in the upper 60s this afternoon. you can see the high clouds already streaming in from the northwest, especially in virginia. into maryland we still have mainly clear skies but that's going to be the case today. lots of high clouds with 40s. in fact, low 40s in frederick and 41. 45 la plata. across the bay had a chance to

get to easton also saturday, 50 degrees. your highs today temperatures in the 60s to around 70 or so. warm, warm weather coming later this week. more on that coming up right now. monika, 4:26, time saver traffic. thank you so much. good morning, everybody. if you're planning to head around town this morning, no big deals to report on the beltway. all the overnight construction should be cleared up shortly, especially if you're traveling on the dulles toll road. want to let you know about that. on the eastbound side approaching route 7, you want to stay to the right. single file to the right overnight. there is one accident. it was a high speed police chase that ended in an accident on route 123 northbound right here hunter mill road and on the northbound side just be aware. you'll have to be follow police direction. southbound is unaffected by the accident. let's take you live outside on the northbound side of 95. here's what it looks like at the fairfax county parkway. no issues to report as you head towards springfield on to 395. a live look over in bethesda,

no problems to report on old georgetown road as you head in the arlington boulevard area. no problems on 270 heading south from frederick. in my next report, we'll take a closer look at area roads at 4:39. back to you. >> thank you, monika. wednesday marks the one- year anniversary of the death of osama bin laden. u.s. officials say they fear a revenge attack by al qaeda. >> white house terrorism advisor is warning americans overseas to be vigilant ahead of the anniversary. >> reporter: the f.b.i. is warning americans to be on alert ahead of wednesday's one- year anniversary of bin laden's death. >> we don't see any active plot that is under way but we are maintaining our guard. >> reporter: counterterrorism advisors admit al qaeda likely wants payback for the killing of its leader but officials say the terror group is no longer capable of carrying out a september 11-like attack. the annual versery of the bin laden death comes in the middle

of a presidential campaign. republicans are arguing democrats are trying to use it for political gain. the obama campaign released this web video questioning whether likely republican nominee mitt romney would have made the decision to raid bin laden's compound in pakistan. >> he took the harder and the more honorable path and the one that produced in my opinion the best result. >> reporter: republicans say the video crosses the line. >> it took something that was a unifying event for all americans. >> he's managed to turn it into a divisive partisan political attack. >> reporter: president obama's campaign says the ad is fair game. >> osama bin laden no longer walks on this planet today because of that brave decision and the brave actions by the men and women in our military and quite frankly mitt romney said it was a foolish thing to do a few years ago. >> reporter: both candidates agree more still needs to