Airman Chelsea Pitchford updates information on an aircraft status board. U.S. Navy Airman Chelsea Pitchford updates information on an aircraft status board in the amphibious air traffic control center aboard the amphibious assault ship USS Essex (LHD 2) while the ship is underway in the Philippine Sea on Sept. 21, 2010. The Essex participated in Valiant Shield 2010, a joint U.S. military exercise in the western Pacific Ocean. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 157559-L-RBF69-549.jpg Photo Gallery