Air Force Tech Sgt. Kristen Nickerson, left, 423d Medical Squadron NCO in charge of bio-environmental engineering, conducts a qualitative fit test on a N95 mask for Staff Sgt. Jennalyse Adam, 423d MDS dental assistant, April 14, 2020, at RAF Alconbury, England. Despite having to operate at 50% manning since March, many MDS Airmen have excelled in implementing the necessary measures and processes to ensure the safety of the Pathfinder family. (U.S. Air Force photo by Senior Airman Eugene Oliver)