DARWIN, AUSTRALIA - APRIL 15: In this handout photo provided by the Australian Defence Force, Prince Harry patrols during Exercise Thunder Observer, a Joint Fire Team exercise with the 8th/12th Regiment, Royal Australian Artillery, at Robertson Barracks on April 15, 2015 in Darwin, Australia. Prince Harry has spent his first two weeks secondment in the Australian Army with the North-West Mobile Force (NORFORCE) and the 1st Brigade. (Photo by CPL Oliver Carter/Australian Defence Force via Getty Images)