kris van cleave, cbs news, santa clara, cuba. >>> coming up on the "morning news." disturbing clown sighting. people at a south carolina town are spooked by reports of clowns living in a wooded area. canada's prime minister stars in a comic book. this is the "cbs morning news." doctors recommend taking ...non-drowsy claritin every day of your allergy season. claritin provides powerful, non-drowsy 24 hour relief... for fewer interruptions from the amazing things you do every day. live claritin clear. see me. see me. don't stare at me. see me. see me. see me to know that psoriasis ...i won't stop until i find what works. discover cosentyx, a different kind of medicine for moderate to severe plaque psoriasis. proven to help the majority of people find clear or almost clear skin. 8 out of 10 people saw 75% skin clearance at 3 months. while the majority saw 90% clearance. do not use if you are allergic to cosentyx. before starting, you should be tested for tuberculosis. an increased risk of infections and lowered ability to fight them may occur... ...tell your doctor if

kris van cleave has more on the potential hazard. >> reporter: the faa has been concerned about the fire danger posed by lithium ion batteries for years. this video shows the impact of the a fire in a simulated cargo hold. the agency and airlis warning fliers not to use or charge the samsung galaxy 7 onboard an aircraft because of a fire risk linked to its batteries. lynn yom i lith yom lith yam ion batteries charge cell phones, laptops, tablets, even children's cars. . >> the more you put into a space the more likely bad will happen if it's operated incorrectly. >> reporter: princeton dan steinguard studies lithium ion batteries. he said the danger comes when they're overcharged or overheat. >> it's like one firecracker surrounded by many other firecrackers, if a firecracker goes off it will trigger another one to go off pop, pop, pop. >> reporter: both lynn most lithium ion batteries are made in recalled hov boards often included cheaply made batteries that weren't designed for that kind of use that greatly increased the risk of overheating and fire. george crabtree is with the argonne

kris van cleave explains why installing the technology has been such a struggle. investigators will try to determine if positive train control could have prevented the speeding new jersey transit train from smashing into the hoboken station. this train did not have ptc. (bella dinh-zarr/ntsb vice chairwoman) area that we always look into." the technology relies on gps satellites... radio towers... and ground sensors to monitor a train's speed and location. if it detects a train is going too fast or being operated unsafely... onboard computers kick in to slow or stop it. "it's taking control of the train away from me." in january, amtrak showed us how it works using this simulator. and when you overspeed and it's beeping like that // it will take over at some point.// if you don't take action in six seconds, and put enough brake to satisfy, yes it nationwide, ptc is available on just 29% of passenger locomotives and 22% of passenger track miles. as of last may commuter railroads have spent nearly a billion dollars installing the pricey technology. back in 2011, als

here's transportation correspondent kris van cleave. >> reporter: it's a mistake 16.5 million americans made at least once in the last 12 months-- filling up with premium, or high-octane gas when their vehicle only requires >> depending on the kind of car you have, supreme is much better for it. >> it just requires unleaded, but i prefer to use plus, to keep the engine good. >> reporter: a.a.a. estimates americans have used the high-end gas instead of regular 270 million times in the last year, essentially wasting $2.1 billion. >> i think it's easy to believe that something that says "premium" sounds like a treat. >> reporter: john nielsen from cars designed for regular unleaded gas, and found premium, which on average costs 23% more, offered no benefit at all. >> but the truth is, if your car is designed to run on regular gasoline, using the premium fuel or 93 octane isn't going to make it run better, get better fuel economy or have lower emissions. >> reporter: just 16% of cars require premium fuel. those are typically high- performance or luxury vehicles. but seven in ten cars call f

federal investigators are on the scene, and kris van cleave is following that. >> reporter: tonight, investigators will work to recover video from the two outward-facing cameras and the train's data recorders. the national transporation safety board is leading the investigation. vice chair bella dinh-zarr: >> from the event recorder we hope to get soaks folks such as speed and praiking. >> reporter: new jersey transit says the engineer, 48-year-old thomas gallagher, it came speeding into the hoboken station. the n.t.s.b. hopes to interview gallagher and will econstruct his last 72 hours, including a look at his medical history. federal health screening requirements for train operators are among the lightest, requiring only a hearing and vision check every three years. the rest is up to the railroad. the n.t.s.b. has called for stronger standards. >> we will look at whether there was positive train control installed and all of the aspects related to that before we come to any conclusions. >> repor under a federal mandate to install positive train control, or p.t.c. technology, that ca

the same type of battery is used in all kinds of devices.in here's kris van cleave. >> reporter: the f.a.a. has been concerned about the fire dangero posed by lithium-ion batteries for years. this video shows the impact of a fire in a simulated cargo hold. the agency and airlines are now warning flyers not to use or charge the recalled samsung galaxy note7 onboard aircraft because of a fire risk linked to its batteries. lithium-ion batteries power as many as 95% of rechargeable ld tablets, laptops, children's toys even electric cars. th the more energy you put into a small amount of space, theou more likely something bad will happen if it is operatedpp incorrectly. >> reporter: princeton university assistant professor dan steingart studies lithium- he says the danger comes if they are overcharged or overheat. >> it is causing a fire cracker to go off in the battery, if you have one fire cracker surrounded by men other fire crackers, it will trigger the other ones to go off, pop, pop, pop. >> reporter: most are made in asia and the vast majority work without an issue.th unless there i

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