When The Beatles first visited the United States, they called him "Mr. Life Magazine" so they invited him to their hotel room and rehearsals.
As a staff photographer for Life Magazine, he covered a wide variety of stories, from revolutions in Latin America to the Beatles' arrival in the US. He also worked for other magazines, including Time and Sports Illustrated.
After Robert F. Kennedy's assassination, he quit photographing politicians. He did, however, hang out a window to photograph the crowds that lined the railroad tracks as the senator's funeral train went by.