180901-N-OM854-0016 PACIFIC OCEAN (Sept. 1, 2018) A 3D printed bolt, a broken bolt, and the final manufactured bolt for a hangar bay door assembly sit from left to right on a 3D printer aboard the Nimitz-class aircraft carrier USS John C. Stennis (CVN 74). John C. Stennis is underway conducting routine operations in the U.S. 3rd Fleet area of operations. (U.S. Navy photo by Mass Communication Specialist 3rd Class Grant G. Grady/Released)