Daniel Williams Air Force Maj. Daniel Williams demonstrates the fit of an N95 elastomeric half-mask respirator. Williams serves as product manager of the Warfighter Expeditionary Medicine and Treatment Project Management Office's N95 respirator efforts at the U.S. Army Medical Materiel Development Activity. SHARE: Download: Full Size (0.26 MB) Credit: Jeffrey Soares, Army VIRIN: 210111-O-IE261-571M.JPG Photo Gallery