FRAME FIXED U.S. seaman Jason Nitz tightens screws on the frame of a jet engine inside the jet shop of the USS Abraham Lincoln in the Pacific Ocean, Oct. 8, 2011. Nitz is an aviation machinist's mate airman. Abraham Lincoln is underway conducting a composite training unit exercise. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 065116-X-TLI18-720.jpg Photo Gallery