Republican presidential candidate John McCain has been caught on videotape joking about bombing Iran. McCain made the joke in response to a question from a voter in South Carolina. When asked about whether the U.S. should attack Iran, McCain began singing “Bomb, Bomb, Bomb Iran” to the tune of the old Beach Boys song “Barbara Ann.” McCain has defended his joke. When reporters asked him last night if the joke was insensitive, McCain said: “Insensitive to what? The Iranians?” He went on to say, “My response is, lighten up and get a life.”