In January 2003, Bill Clinton attended the 80th birthday of former Israeli Prime Minister Shimon Peres, his friend and partner in pursuit of Middle East peace during the 1990s.Onstage at a gala celebration in Israel, a twinkly-eyed Clinton sang along with a teenage pop star to John Lennon’s homage to world peace, “Imagine.”Clinton may have stumbled his way through Lennon’s inspiring lyrics—"You may say I'm a dreamer...."—but his heart was in it.