Capt. Sean Bundles, 78th Medical Logistics flight commander,

Capt. Sean Bundles, 78th Medical Logistics flight commander, shows a 3D-printed N-95 respirator to Air Force Chief of Staff Gen. David L. Goldfein during his visit to Robins Air Force Base, Georgia, June 24, 2020. The device which is under development through a collaboration with the Spark Innovation Hub, uses replaceable filters cut out from N-95 material. The CSAF visited the installation to get updates on its Return to Full Capacity and receive briefings on the 78th Air Base Wing, the WR-ALC and Team JSTARS. (U.S. Air Force photo by Tommie Horton)