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In this June 9, 1987 photo, Sen. Joe Biden, D-Del., waves from his train as he leaves Wilmington, Del., after announcing his candidacy for president. At right, son Beau carries daughter; to Biden's right is his wife Jill and son Hunt. Barack Obama named Biden, as his vice presidential running mate early Saturday, Aug. 23, 2008, balancing his ticket with a seasoned congressional veteran well-versed in foreign policy and defense issues. (AP Photo/George Widman)