Northcom Visit Marine Corps Gen. Joe Dunford, chairman of the Joint Chiefs of Staff, and Air Force Gen. Lori J. Robinson, commander of U.S. Northern Command, discuss North American Aerospace Defense Command and Northcom activities at Peterson Air Force Base, Colo., Mar. 1, 2017. DoD photo by D. Myles Cullen SHARE: Download: Full Size (0.46 MB) Credit: D. Myles Cullen VIRIN: 170301-D-VO565-007.JPG Photo Gallery