CNN CNN Newsroom May 25, 2013 16:11:00
Two freight trains colliding in missouri. it caused the flames you see here. the overpass collapsed when one of the trains struck a pillar. seven people have been streeted. now to the bridge collapse on a major interstate. remarkably no one was killed when the bridge fell into the river after getting struck by an 18-wheeler. but there are many questions about how that bridge collapsed when that 18-wheeler rode by. cnn's dan simon has more. >> reporter: it happened after rush hour. the bridge was nearly empty. >> riverside bridge over i-5 just collapsed. we have people in the water. >> report...