Obama stirs debate with Hiroshima visit

By Minami Funakoshi HIROSHIMA, Japan (Reuters) - Barack Obama on Friday becomes the first sitting U.S. president to visit Hiroshima, site of the world's first atomic bombing, a gesture Washington and Tokyo hope will showcase their alliance and breathe life into stalled efforts to abolish nuclear arms. The two governments hope Obama's tour of Hiroshima, where an atomic bomb killed thousands instantly on Aug. 6, 1945, and some 140,000 by the year's end, will highlight a new level of reconciliation