Pfc. Eddy L. Gibbs, a mortarman from Weapons Co., Battalion Landing Team 2/2, 26th Marine Expeditionary Unit, fires an M-16A4 service rifle while wearing a M-40 field protective mask at a range in the Middle East, May 26, 2007. Gibbs and other Marines from BLT 2/2 were conducting chemical, biological, radiological, nuclear defense training alongside regional forces. (Official USMC photo by Cpl. Jeremy Ross) (Released) - Pfc. Eddy L. Gibbs, a mortarman from Weapons Co., Battalion Landing Team 2/2, 26th Marine Expeditionary Unit, fires an M-16A4 service rifle while wearing a M-40 field protective mask at a range in the Middle East, May 26, 2007. Gibbs and other Marines from BLT 2/2 were conducting chemical, biological, radiological, nuclear defense training alongside regional forces. (Official USMC photo by Cpl. Jeremy Ross) (Released)