150331-N-SI600-671 STRAIT OF GIBRALTAR – The Ticonderoga-class guided-missile cruiser USS Vicksburg escorts the Nimitz-class aircraft carrier USS Theodore Roosevelt during a transit through the Strait of Gibraltar March 31, 2015.Theodore Roosevelt deployed from Norfolk and will execute a homeport shift to San Diego at the conclusion of deployment. Theodore Roosevelt is conducting naval operations in the U.S. 6th Fleet area of operations in support of U.S. national security interests in Europe.