Former US Senator Chuck Hagel, President Barack Obama's nominee for US Secretary of Defense, testifies during his confirmation hearing before the Senate Armed Services Committee on Capitol Hill in Washington, DC, on Jan. 31, 2013. Facing tough questions from some senators at his confirmation hearing, Hagel said in his opening remarks that he wanted to keep America's armed forces the strongest in the world and that he supported using military force to safeguard the country's interests.