(From left to right) The Honorable Cory Gardner, U.S.

(From left to right) The Honorable Cory Gardner, U.S. Senator for Colorado, Gen. Lori J. Robinson, commander of the North American Aerospace Defense Command and U.S. Northern Command, and Gen. Jonathan Nance, Chief of the Defence Staff of the Canadian Armed Forces, pause for a photo during the NORAD 60th Anniversary Ball in Colorado Springs, Colo., May 11, 2018. The NORAD 60th Anniversary Ball commemorates 60 years of binational cooperation between the U.S. and Canada for the defense of North America. Established in 1958, NORAD is the world's only binational military command. (DoD photo by Staff Sgt. Emily Kenney, USAF)