Steve Leadore, an equipment technician for the joint service aircrew mask - fixed wing (JSAM-FW) research team, watches as Staff Sgt. Alex Whalton performs a mid-ear equalization manuever while wearing an M-53 mask, part of the JSAM-FW system. A Department of Defense research team working on the development of a joint service aircrew mask conducted field assessments at the 167th Airlift Wing, West Virginia Air National Guard unit in Martinsburg, WV, December 7, 2011. The team had aircrew in each of the flying positions don the mask and accompanying gear and perform their duties on a C-5 aircraft. (Air National Guard photo by Master Sgt. Emily Beightol-Deyerle)
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