President-elect Barack Obama plans to order the closing of the U.S. military prison at Guantanamo Bay as early as his first week in office to show a break from the Bush administration's approach to the war on terror, according to two officials close to the transition. One of the officials said it would be in keeping with Obama's campaign promise to shut down the prison through executive order, a move which was also pushed by last year's Republican presidential nominee, Sen. John McCain, R-Arizona.