Members of Joint Base Andrews prepare for the arrival of Justin Trudeau, Prime Minister of Canada, on the JBA flightline March 30, 2016. More than 20 countries arrived here for the 2016 Nuclear Security Summit held in Washington, D.C. The summit provides a forum for leaders to reinforce commitments to securing nuclear materials. (U.S. Air Force photo by Senior Airman Mariah Haddenham/RELEASED)