A 4th Special Operations Squadron Airman holds a spent 105mm round that has been fired from an AC-130U Spooky during a training mission Feb. 3, 2011, at Hurlburt Field, Fla. (U.S. Air Force photo/Master Sgt. Jeremy T. Lock) Photo essay: 'Spooky' training at Hurlburt Field by Master Sgt. Jeremy T. Lock 1st Combat Camera Squadron Public Affairs 2/9/2011 - HURLBURT FIELD, Fla. (AFNS)  -- Members of the 4th Special Operations Squadron participate in a training mission aboard an AC-130U Spooky here Feb. 3. The AC-130U is the primary weapon for members of Air Force Special Operations Command. The gunship's primary missions are close-air support, air interdiction and armed reconnaissance. View the slideshow.