Player Embed Code: Download Embed Share 3-126th Aviation Regiment Conducts Annual CH-47 Door Gunnery Qualification Maryland National Guard Public Affairs Office June 19, 2015 | 0:51 Staff Sgt. Darren Eggerman, a CH-47 flight engineer with the Maryland National Guard's 3rd Battalion, 126th Aviation Regiment, conducts an annual door gunnery qualification at Fort Dix, Nj., June 19, 2015.