** FILE ** Joint Chiefs Chairman Gen. Martin Dempsey listens on Capitol Hill in Washington, Wednesday, March 5, 2014, while testifying before the Senate Armed Services Committee hearing focusing on the Defense Department’s budget request for fiscal year 2015. (AP Photo/J. Scott Applewhite)
** FILE ** Joint Chiefs Chairman Gen. Martin Dempsey, left, and Defense Secretary Chuck Hagel, appear on Capitol Hill in Washington, Wednesday, March 5, 2014, at a Senate Armed Services Committee. (AP Photo/J. Scott Applewhite)
** FILE ** Sen. John McCain, R-Ariz., questions Defense Secretary Chuck Hagel on Capitol Hill in Washington, Wednesday, March 5, 2014, during the Senate Armed Services Committee hearing focusing on the Defense Department’s budget request for fiscal year 2015. The committee's ranking member Sen. James Inhofe, R-Okla. is at left. (AP Photo/J. Scott Applewhite)
**FILE** Senate Armed Services Committee member Sen. Mike Lee, R-Utah, questions former Nebraska Republican Sen. Chuck Hagel, President Obama's choice to lead the Pentagon, during his confirmation hearing before the committee on Capitol Hill in Washington, Thursday, Jan. 31, 2013. (AP Photo/J. Scott Applewhite)