Master Sgt. Patrick Patterson cocks the catapult he and two other NCOs from the 960th AACS intend to enter in “Viking Fest” this fall. Their machine was constructed from 2x6s and uses three 100-pound exercise bands as its power source. “Considering its mobility, along with the ability to change the launch angle and to fine-tune the tension, we can put ‘warheads on foreheads’ anywhere on the field,” said Patterson, the principal designer of the medieval siege engine. (Air Force photos by Mike W. Ray)

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Photo by: Mike W. Ray |  VIRIN: 130809-F-JJ999-040.JPG