The Washington Post reports the U.S. State Department's formally removed Cuba from its official list of state sponsors of terrorism. The move signals a significant, symbolic step toward the normalization of ties between Washington and Havana and the potential opening of embassies in both countries. Cuba's status as a "state sponsor" of terrorism had been under review since last year, when the White House signaled its intent to forge an opening with the country's communist government after decades of Cold War animosity. Cuba's designation remained a curious one and, like much that still shapes the U.S.-Cuba relationship, was a relic of the past. Here's what you need to know about Obama's move to enter the present.