Senator John McCain, a Republican from Arizona and chairman of the Senate Armed Services Committee, listens during a hearing with former Secretaries of State Henry Kissinger, George Shultz and Madeline Albright, not pictured, in Washington, D.C., U.S., on Thursday, Jan. 29, 2015. The hearing was titled "Global Challenges and the U.S. National Security Strategy." Photographer: Andrew Harrer/Bloomberg via Getty Images
