Train cars with toxic cargo fall off New Jersey bridge
updated 12:20 PM EST, Fri November 30, 2012

Train tanker cars dangle from a collapsed railroad bridge near Paul*****oro, New Jersey, on Friday.
STORY HIGHLIGHTS
- NEW: A toxic chemical from one derailed train car has dissipated, an official says
- NEW: Righting one of the overturned cars will be a "delicate move," official says
- Four train cars with toxic chemicals come off the tracks near the Delaware River
- 18 people are treated for possible respiratory issues