Courtney Birkett, 733rd Civil Engineer Division archaeologist, cleans an artifact at Fort Eustis, Va., Dec. 16, 2013. The 733rd CED archaeological team also provides tours of the Matthew Jones House, the oldest facility on Fort Eustis, which dates back to the early 17th century. (U.S. Air Force photo by Airman 1st Class Austin Harvill/Released)