160419-N-UK999-056 FASLANE, United Kingdom (April 19, 2016) The Los Angeles-class fast attack submarine USS Springfield (SSN 761) arrives at Her Majesty's Naval Base, Clyde for a scheduled port visit April 19, 2016. Springfield is conducting naval operations in the U.S. 6th Fleet area of operations in support of U.S. national security interests in Europe. (Photo courtesy of Royal Navy/Released)