Lisa Disbrow, Undersecretary of the Air Force, left, and Tom Falck, Grand Forks County Commissioner, right, sign the Joint Use Agreement between the U.S. Air Force and Grand Forks Country March 30, 2016, at Grand Forks Air Force Base, N.D. This agreement allows the county and its partners to use the runway on Grand Forks AFB. (U.S. Air Force photo by Senior Airman Xavier Navarro)

Lisa Disbrow, Undersecretary of the Air Force, top, and North Dakota U.S. Senator Heidi Heitkamp, right, views the flight line and the Grand Sky area during a base tour on March 30, 2016, at Grand Forks Air Force Base, N.D. The base tour consisted of Radar Approach Control (RAPCON) tower and a Block 40 RQ-4 Global Hawk brief. (U.S. Air Force photo by Senior Airman Xavier Navarro)

Lisa Disbrow, Undersecretary of the Air Force, center left, and North Dakota U.S. Senator Heidi Heitkamp, center right, with Members of the 319th Air Base Wing and also along with members of the U.S. Customs and Border Patrol, pose for a group photo during a base tour on March 30, 2016, at Grand Forks Air Force Base, N.D. The base tour consisted of Radar Approach Control (RAPCON) tower and a Block 40 RQ-4 Global Hawk brief. (U.S. Air Force photo by Senior Airman Xavier Navarro)