Prince Harry arrives on Capitol Hill in Washington

Britain's Prince Harry of Wales (2-L) looks at a ground penetrating radar, a tool used for detecting land mines, during tour of a HALO Trust photo exhibit on landmines and unexploded ordinances, with Republican Senator from Arizona John McCain (L) and HALO Trust Weapons and Ammunition Disposal Desk Officer Richard Boulter (R), on Capitol Hill in Washington, DC on May 9, 2013. UPI/Michael Reynolds/Pool