151114-N-KB426-079 NATIONAL CITY, Calif. (Nov. 14, 2015) Sailors from Navy Region Southwest scan the streets of National City. Calif., for trash during a semiannual �Main Street Cleanup� community relations event. Naval Base San Diego (NBSD) hosts the event twice a year in an effort to improve the appearance of areas in San Diego and maintain a positive relationship with the communities surrounding the base. (U.S. Navy photo by Mass Communication specialist 3rd Class James Vazquez/Released)