The U.S. Played a Crucial Role in Colombia's Historic Peace Deal. Here's How.

After more than half a century of war, with about 220,000 lives lost and millions of people displaced from their homes, Colombia and the rest of the continent are celebrating. Peace is finally within reach. This week, the government of Colombia and the Revolutionary Armed Forces of Colombia, or FARC, signed a peace accord expected to be ratified by the people in a nationwide referendum on Sunday. The road ahead is risky and dangerous ― the conflict opened many wounds ― but now at least,...