Thu, May 1, 2014 9:57 PM EDT 2:34
The Transportation Department is proposing new rules to make rail tankers less likely to leak and explode after a derailment. The amount of Bakken oil transported by rail has increased 20 fold since 2008. But federal authorities say the chemical properties of Bakken crude make it more flammable than oil from other areas. Elaine Quijano reports.