Clam Shell Sparks Navy Petty Officer 3rd Class Derek Ruch grinds a clam shell for securing doors in the welding booth aboard the aircraft carrier USS Theodore Roosevelt in the Pacific Ocean, Nov. 13, 2015. The carrier is operating in the U.S. 3rd Fleet area of operations as part of a worldwide deployment. Ruch is a hull maintenance technician. U.S. Navy photo by Seaman Joseph S. Yu SHARE: Download: Full Size (1.09 MB) Credit: Navy Seaman Joseph S. Yu VIRIN: 151113-N-LP538-082.JPG Photo Gallery