July 4 Greetings Acting Defense Secretary Dr. Mark T. Esper talks with Marines at the Salute to America Independence Day celebration in Washington, July 4, 2019. SHARE IMAGE: Download Image: Full Size (1.55 MB) Tags: marine corps, navy, independence day, acting defense secretary, esper Photo By: Lisa Ferdinando, DOD VIRIN: 190704-D-BN624-0561Y.JPG Photo Gallery