>> glor: a deadly train derailment in the northeast, two are dead, dozens hurt after the amtrak train collided with a piece of construction equipment near philadelphia. also tonight winter weather in spring time, fierce winds knock out power to hundreds of thousands. more snow is on the way. a major refinery that exploded last year in california is cleared to reopen. neighbors say pollution concerns are losing out to profits. and racers start your drones. rising stars of the sport that is just taking off. >> what is that sensation like for your body? >> it feels so realistic that your heart rate starts going up. captioning sponsored by cbs this is the "cbs evening news. >> glor: good evening, i'm jeff glor.

this is our western edition of the broadcast. nearly 350 passengers and crew members were on board when an amtrak train hit a backhoe on the tracks about 20 miles south of philadelphia in chester, pennsylvania, this morning. two amtrak workers who were on the backhoe died. dozens on the train are hurt. tonight as the investigation gets under way our transportation correspondent kris van cleave is on the scene. >> reporter: investigators worked around the damaged front end of amtrak train 89 after it collided with a backhoe early sunday morning in chester just south of philadelphia. 341 passengers and seven crew were on the new york to savannah, georgia train, passenger beth blakely. >> it fell like a car accident, like an impact. and it was a rough ride. it took a long time to stop. and all you could see was a lot of dirt and debris flying past the train and then there were a couple of sort of fire flashes and then we came to a stop. it was pretty panicky. >> reporter: the national

transportation safety board is leading the investigation into what happened shortly before 8:00 a.m. the two amtrak employees killed were from the construction crew working on the backhoe. the collision tore into the train's first passenger car. roughly three dozen from the train were taken to local hospitals. >> it looked like it had been banged up a bit but that was on the outside of the train, the windows were broken in and it looked pretty harsh. >> reporter: this accident comes less than a year after the deadly derailment of amtrak train 188 in philadelphia which killed eight. just last month another amtrak train derailed in kansas injuring more than 30. this morning's deadly collision stopped service between philadelphia and points south on amtrak's heavily trafficked northeast corridor for hours. sunday's are typically one of amtrak's busiest travel days. still track work is not uncommon during early morning hours on weekend. the n.t.s.b. investigator in charge, ryan frega. >> as of now we have recovered the event data recorder, the

forward facing video and the inward facing video from the locomotive to send to our laboratory in washington d.c. >> reporter: amtrak has restored partial service through the crash scene but jeff, what tomorrow morning's commute looks like depends largely on how long the n.t.s.b. needs the train to stay on scene here as their investigation continues. >> glor: kris van cleave, thank you very much. winter weather returned to the east this weekend with bitter temperatures, snow and dangerous winds. here's jamie yuccas. >> reporter: an arctic blast is being felt along the east coast. two people died in massachusetts when a tree fell on their car. the visibility over boston harbor was also near zero for much of the morning. on social media, signs of spring looked more like winter with tulips sprouting through new snow. >> we've had some cold air funneling in from canada. >> reporter: wbz meteorologist pamela gardner. >> i have to ask you it is april, we had a mild winter, it is spring, why is this happening now.

>> it seems mother nature is playing a joke on us. the jet stream is digging a little farther to the south but it looks like in the long-range forecast models we'll see that polar jet lift to the north and maybe by midweek we can be back to more spring like temps. >> reporter: strong winds caused damage in new jersey where windows shattered and pieces of a fence went flying. trees toppled and an empty beach house was blown over in new york. winds there gusted up to 60 miles per hour. in february, a crane collapsed in these types of conditions killing a person in lower manhattan. >> we're putting new restrictions on crawler cranes. >> reporter: new safety measures are being tested today with crane inspectors out in the field. from the midwest to the northeast, more than 300,000 people woke up without power. and according to flightaware.com, passengers flying into newark, new jersey, were delayed more than two hours due to wind. and earlier today the national

data buoy center reported waves as high as 20 feet off the coast of new jersey. it is expected to be cold here in new york again tomorrow. by wednesday those temperatures do start to climb. but jeff, with that means rain for much of the east coast. >> glor: jamie, thank you very much. on tuesday, the race for the white house moves to wisconsin where a cbs news battleground tracker poll out today shows ted cruz six points ahead of frontrunner donald trump. here's major garrett. >> reporter: despite trailing in wisconsin donald trump sat with his eggs in a milwaukee diner and sounded sunny side up. >> i think we're going to do really well in wisconsin. i think we have a chance of winning it. >> reporter: trump usually wins where he leads and loses where he trails. and he's trying to recover from a very bad week. florida police charged trump's campaign manager cory lewandowski with battering a female reporter and trump struggled numerous times to

explain who would be punished if abortion were outlawed. >> the answer is that, there has to be some form of punishment. >> to the woman. >> yeah. at this moment, the laws are set. and i think we have to leave it that way. >> reporter: on "face the nation," trump said ups and downs are part of politics. >> i don't know that it's been the worst week in my campaign. i think i have had many bad weeks and many good weeks, i done see this as the worst week of my campaign. >> god bless the great state of wisconsin. >> reporter: ted cruz in green bay with wisconsin governor scott walker sought to capitalize by consolidating the anti-trump vote. >> nominating donald trump would be arainwreck. and that's not fair to trainwrecks. (laughter) >> reporter: a cruz win in wisconsin could buoy his campaign with grass roots donations and establishment backing. trump holds commanding leads over cruz in states like new york which votes april 19th, and pennsylvania which votes april 26th. earlier this week in a speech to college students about success

trump said one key is understanding the power of momentum and the importance of keeping it. trump's momentum has propelled him through most of this campaign and jeff, it is now on the line in wisconsin. >> glor: major garrett, thanks. on the democratic side our new poll shows bernie sanders two points ahead of frontrunner hillary clinton in wisconsin. so we'll bring in our elections director anthony salvanto. anthony, always good to see you. the frontrunners, both of them have fallen behind in wisconsin. let's talk about the democrats first. overall for hillary clinton how much of a concern is that? >> in wisconsin you have a very liberal democratic electorate, that tees is up well for someone like bernie sanders so it is a close race there. but overall the delegate math is still on hillary clinton's side. because she's got the lead in the elected delegates and she's got a lead in what we call superdelegates. t ose are party leaders on the democratic side who can support whomever they want. they are still behind her as well. so the climb for bernie sanders even if he wins wisconsin is still pretty steep.

>> glor: to the republicans. donald trump had a rough week. he is still up in two of the three states you looked at, new york and pennsylvania, down in wisconsin, why? >> the rough week you mentioned, the controversy around some of his comments, that's pretty much baked into the cake for donald trump supporters at this point. they tell us in the polls that they think sometimes some of his comments go a little too far but they're supporting him anyway. so the lead you see for ted cruz in wisconsin i think is more reflective of a very conservative republican electorate there and the kind of voter who is looking for conservative candidates. >> glor: so for ted cruz what does wisconsin represent then? >> it's probably the last chance for awhile to put a dent into donald trump's lead. it is that kind of conservative state but going forward those states you mentioned, new york, pennsylvania, the map now goes into territory that probably favors donald trump. >> glor: anthony salvanto, thank you very much. >> thanks, jeff. >> glor: a new study today confirms what millions of people taking statins have been complaining about for years and it may offer solutions.

jericka duncan has more on this. >> reporter: peggy o'connor who suffered a heart attack after years of battling high cholesterol had complained to her doctor about statins she was taking. drugs that can lower bad cholesterol. >> when i started on the statin, i started having muscle spasms. >> reporter: claims like that were initially dismissed by some in the medical community. dr. steven nissing is the lead researchers of the cleveland clinic study. >> we confirmed that this is a problem that's real. and we have given them an alternative. >> reporter: dr. nissing says problems including muscle pain and weakness affect up to 10% of people on statins, or 3 to 4 million americans. the study looked at more than 500 patients who reported side effects and are considered statin-intolerant. the patients in the study were given a statin or a sugar pill. about 42% who took a statin experienced muscle pain or weakness. the second part of the study

involved testing nonstatin cholesterol lowering drugs. one was an oral drug. the other injectable. both worked, however the injectable had better results. >> patients that got one of the new injectable cholesterol lowering drugs had a 52 to 54% reduction in the levels of their bad cholesterol. >> reporter: what are the costs per year when talking about the injectable nonstatin drugs? >> it is about $14,000 a year. so they are quite expensive. >> reporter: the cost for statins is a few hundred dollars per year. dr. nissing estimates about 36 million people in this country rely on statins. so far, two injectable nonstatins have been approved by the fda, jeff. >> glor: jericka duncan, thank you. the airport in brussels, belgium, reopened today under extremely tight security. the first flight since the airport was hit by a deadly terror bombing last week took off to portugal. intercontinental flights are expected to resume tomorrow.

an isis commander blamed for the death of a marine was killed today by a drone strike in iraq. the isis member was said to be behind the rock elevator attack that killed staff sergeant louis cardin and wounded eight other marines last month. also engaged in the fight against isis with the help of u.s. forces are kurdish soldiers, the peshmerga. holly williams has more on this. >> reporter: for nearly two years iraq's kurdish fighters have lead the battle against isis. known as the peshmerga, which means "one who faces death." these kurdish soldiers have helped claw back towns, villages and territory from the extremists. nearly 1,400 peshmerga have lost their lives in a war they are fighting without enough body armor or helmets to go around, with very few heavy weapons. and against an enemy that uses suicide bombs and booby traps. >> the kurds are not only fighting for themselves but the

rest of the world. >> reporter: masrour barzani is the head of the security council in a region that has been plunged into economic crisis by the falling price of oil with consequences for the peshmerga. >> they haven't been paid for four months at least. >> reporter: they haven't been paid for four months and fighting isis on the front line. >> they are. they believe in the cause. but unfortunately they have families. there are people to take care of. and we don't know for how much longer they can stand on the front lines without being paid. >> reporter: the kurds say the war against isis has cost them billions of dollars. not only in bullets and fighters' pay but because they've opened their doors to outsiders. >> you've taken in 1.8 million people. >> yes. >> reporter: who have fled isis. >> yes. >> reporter: that is a big burden for such a small place. >> it is, absolutely. it has increased the population of kurdistan by almost 50%. >> reporter: and near the front

line, just north of mosul, a city occupied by isis, is another potential disaster. mosul dam, which was built by saddam hussein's regime on weak foundations has fallen into disrepair. and dangerously so. engineers warn that it could break at any time. >> reporter: what would happen if the dam broke? >> a large part of mosul will be flooded in a matter of a few hours. and then anything on the way, all the way to baghdad, it would take a few days to reach baghdad, but it would be flooded. everything, you know, on the way. >> reporter: the u.s. says it could trigger a 45 foot high flood wave on the river tigris, endangering the lives of 1.5 million people, in a part of the world already suffering the effects of another manmade catastrophe.

holly williams, cbs news, erbil, iraq. >> glor: the reopening of a major oil refinery and the neighbors against it, and an escalator sends flyers fans flying. and we're off to the drone races when the "cbs evening news" continues. when the "cbs evening news" continues. ♪

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in parts of california above $4 per gallon. homeowners within miles of the facility packed a 12 hour public hearing, worried about what reopening the refinery will do to their air. >> i'm very concerned about the pollution that should occur. >> reporter: one engineer compared restarting the plant to starting up an old car. during the first hours, hundreds of pounds of hazardous pollutants will be pumped into the air, numbers exceeding state limits. late last night, the air quality district board voted to allow the company to fully restore refinery operations. as part of the agreement, exxonmobil will have to pay a $5 million fine for those increased emissions and the explosion. in an e-mailed statement exxonmobil tells cbs news it agrees with the decision and is working to safely restart the torrance refinery. exxonmobil sold the refinery last year to a new jersey-based energy company for a half billion dollars. the deal was contingent upon exxonmobil proving the plant is

in good working condition. maureen mock is a city of torrance commissioner. >> this is if you have a payment on your home to get it resold and walk away to a safer place. >> reporter: the district board orders states that exxonmobil cannot restart the plant during school or business hours and must give the community 48 hours notice before it begins operations. danielle nottingham, cbs news, los angeles. >> glor: up next here, a little dog stops traffic on a big bridge. don't let dust and allergies get between you

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>> glor: a big thril >> glor: a big thrill turned into a big scare for hockey fans in philadelphia last night. an escalator suddenly sped up at the wells fargo center, home of the flyers after they won. fans were sent tumbling. nobody was seriously hurt. the team has not said what caused the malfunction. despite the bitter weather in parts of the east a sign of spring today, baseball. pirates and cardinals playing in pittsburgh for the first game of the regular season. game time temperature, 35 degrees. the pirates won 4-1. and there was a small disruption

on the san francisco bay bridge today, very small-- that is a chihuahua being pursued by a motorcycle officer. they eventually picked the dog up. he is now in the care of an animal shelter. traffic was shut down there just a little bit. police say if this is your chihuahua please come forward. still ahead here, the new sport described as a video game on steroids. steroids. or chronic constipation. it can help relieve your belly pain, and lets you have more frequent and complete bowel movements that are easier to pass. do not give linzess to children under six and it should not be given to children six to seventeen. it may harm them.

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>> glor: think drones and the >> glor: think drones and the first words that come to mind might be spying or secrecy, not sport. that could be changing. across the country a new kind of competition has taken off. and "60 minutes sports" got an up close look. this is what a drone pilot sees as they speed around a course. it's what makes drone racing so addictive. the pilots wear f.p.v. goggles. f.p.v. for first person view. the goggles are receiving streaming video from a camera on the drone. f.p.v. gives racers the sensation that they are flying, that they are the drone. when you first put on those f.p.v. goggles, what's going through your mind?

>> the first thing i had to do was sit down. because it can be a bit disorienting because your body is giving you one sensation and your eyes are giving you something else. >> glor: chad nowak was an oil worker from australia when he won the first u.s. drone racing championship last summer. >> after a couple of flights, all of a sudden the world starts opening up. and i can fly through that doorway now and down that hallway and along that path. >> glor: what is that sensation like for your body? >> it feels so realistic that your heart rate start going up. when you are trying a new trick or shoot a gap, if you don't know if it doesn't work you will break and your heart starts pounding and you get a little bit nervous. >> glor: most pilots begin by fooling around with drones in their backyard. for bapu madhu an employment counselor from california it quickly became an obsession. >> when i started the hobby it was just something to do, just to kill time.

but it is just so addictive. i have always been a gamer all my life. and this, this right here drone racing is like video game on steroids, i think. >> glor: you can see the full story and the rest of "60 minutes sports" tuesday night on showtime. that is the "cbs evening news" tonight. later on cbs "60 minutes," and first thing tomorrow, "cbs this morning." i'm jeff glor in new york. good night. captioning sponsored by cbs captioned by media access group at wgbh access.wgbh.org

describe an explosion, flam. and chaos on board the trai the mystery of the missing head---- solved tonight. w'l have the story of of what happened to an iconic st a deadly derailment. passengers explain the explosion on the train. >> what happened to an iconic statue. >> he didn't get too far, a chihuahua chase on the bay bridge. ,,,,,,

passengers moving. working to ease the commute, cal train making changes to keep thousands of bay area passengers moving. good evening. i'm brian hackney. >> and i'm juliette goodrich. with increasing demand, cal train often runs full peak time, leaving no space to squeeze in passengers, let alone