111026-N-UK333-010 PEARL HARBOR, Hawaii - (Oct. 26, 2011) - Electronics Technician 1st Class (SS) Edgar Alvarez explains topside operations of the Los Angeles-class submarine USS Cheyenne (SSN 773) to a group of Radford High School Navy Junior Reserve Officer Training Corps cadets during a tour of Cheyenne. The cadets were on board Joint Base Pearl Harbor-Hickam, Oct. 26, to learn about the submarine force and to visit several historical sites. (U.S. Navy photo by Mass Communication Specialist 2nd Class Ronald Gutridge /Released).