Clinton, Area 51, and the Search for UFO Secrets

What happens when the most powerful man in the world asks his own government a direct question and still can't get a straight answer? When Bill Clinton took office in 1993, he wanted to know two things: who really killed John Kennedy, and whether the United States was sitting on proof that we aren't alone. He handed the assignment to his friend Webb Hubbell, the third-ranking official at the Justice Department, and Hubbell went looking with the access of a man who reported straight to the President. He came back with a wall.

This episode traces that wall across...