FILE - This June 6, 2016, file aerial video image taken from a drone shows crumpled oil tankers lying beside the railroad tracks after a fiery June 3 train derailment that prompted evacuations from the tiny Columbia River Gorge town of Mosier, Ore. U.S. safety officials say they've seen slow progress in efforts to upgrade or replace tens of thousands of rupture-prone rail cars used to transport oil and ethanol, despite a string of fiery derailments.
FILE - This June 6, 2016, file aerial video image taken from a drone shows crumpled oil tankers lying beside the railroad tracks after a fiery June 3 train derailment that prompted evacuations from the tiny Columbia River Gorge town of Mosier, Ore. U.S. safety officials say they've seen slow progress in efforts to upgrade or replace tens of thousands of rupture-prone rail cars used to transport oil and ethanol, despite a string of fiery derailments. Brent Foster AP
FILE - This June 6, 2016, file aerial video image taken from a drone shows crumpled oil tankers lying beside the railroad tracks after a fiery June 3 train derailment that prompted evacuations from the tiny Columbia River Gorge town of Mosier, Ore. U.S. safety officials say they've seen slow progress in efforts to upgrade or replace tens of thousands of rupture-prone rail cars used to transport oil and ethanol, despite a string of fiery derailments. Brent Foster AP