The story of a leaky oil tanker stranded off the coast of Yemen is, in part, the story of the country's civil war. There are about a million gallons of oil stored in this tanker, which has not been operational since 2015. That is when Yemen's civil war escalated into an international conflict pitting Houthi rebels who overthrew the government against an international coalition lead by Saudi Arabia. Now, that tanker threatens to unleash a massive oil spill that would devastate the region.