Defense Health Agency Chief Visits the 5MDG Published Aug. 18, 2025 By Senior Airman Trust Tate MINOT AIR FORCE BASE, N.D. -- U.S. Air Force Airman 1st Class Nicole Leon- Perez, a medical technician with the 5th Medical Group on Minot Air Force Base, North Dakota, received a coin from U.S. Air Force Chief Master Sgt. Tanya Johnson, Defense Health Agency senior enlisted leader, during an Aug.13, 2025 visit.