071020-N-7981E-365 PACIFIC OCEAN (October 20, 2007)-Gunner's Mate 3rd Class Dustin Waggener celebrates a successful .50 Caliber machine gun target engagement following a "killer barrel" exercise on the fantail of the Nimitz-class aircraft carrier USS Abraham Lincoln (CVN 72). Lincoln is underway for a scheduled work up to include Composite Training Unit Exercise (COMTUEX), an exercise designed to enhance the interoperability of the carrier and its strike group. U.S. Navy photo by Mass Communication Specialist 3rd Class James R. Evans (RELEASED)