Our ambassador to Libya was killed in our own consulate in Benghazi on the night of September 11. For the next six weeks, President Obama repeated the same talking point: The morning after the attack, he ordered increased security in our embassies in the region. Suddenly, on the campaign trail in Denver on October 26, he changed his story. “The minute I found out what was happening . . . I gave the directive,” he said, “to make sure we are securing our personnel and doing whatever we need to do. I guarantee you everybody in the CIA and military...