Video images of a fireball billowing from the wreckage of a derailed train hauling Bakken crude are adding to pressure on federal regulators to act on new safety standards for oil shipments.

The Obama administration proposed phasing out older tank cars tied to a deadly derailment a year ago and lowering speed limits as part of a set of new rules intended to reduce the risks of hauling crude oil by rail.

The Obama administration proposed phasing out older tank cars tied to a deadly derailment a year ago and lowering speed limits as part of a set of new rules intended to reduce the risks of hauling crude oil by rail.