150615-N-PK884-001 YORKTOWN, Va. (June 15, 2015) Dr. Martin Gallivan, left, an associate professor at the College of William and Mary, shows artifacts found during a field study at Naval Weapons Station Yorktown to Capt. Paul Haebler, commanding officer of Naval Weapons Station Yorktown, and Cmdr. Steven Fichter, Naval Weapons Station Yorktown public works officer. The field study is being conducted through the university as part of an ongoing cooperative agreement with Naval Facilities Engineering Command to survey historical sites aboard the installation. (U.S. Navy photo by Mark Piggott/Released)