Since the rise of domestic oil production, railroads have increasingly become a favored mode of transporting America's crude oil.
But do the dangers, which include the risk of explosive derailments, outweigh the rewards?
National Journal's Clare Foran explains how the fracking boom led to an increase in crude-oil transport via rail and why this matters to America's energy future.
Footage from the Prelinger Archives, CNN, NTSB, KGET-17 News. Special thanks to Barstons Child's Play.