value of the endowment funded by Christ Church, left the cemetery in serious difficulties. Monuments and burial vaults were in disrepair. Maintenance on buildings had been long delayed. There was no paid staff and minimal funding. Drug dealers and prostitutes began to occupy the cemetery. The cemetery is still owned by Christ Church but since 1976 it has been managed by the Association for the Preservation of Historic Congressional Cemetery (APHCC). Progress on the renovation was very slow until two volunteers became involved. Jim Oliver, then assistant manager of the House Republican Cloakroom, became involved in the late 1980s and helped revive congressional interest in the cemetery. The K-9 Corps, a group of dog owners whose activities helped drive away the drug dealers, was organized in 1997. Renovation picked up after C-SPAN broadcast a video on the cemetery on July 5, 1996. The following weekend 100 airmen from Andrews Air Force Base arrived unannounced to mow the 35-acre lawn, and a contingent from the Army post at Fort Belvoir followed the next month. A Joint Service Day involving all five branches of the U.S. military has since become an annual tradition. In 2013, a record 328 people participated. The National Trust for Historic Preservation included the cemetery on its 1997 list of America's 11 Most Endangered Historic Places and many gifts and donations were soon received. Congress gave $1 million in matching funds in 1999 to create an endowment for basic maintenance, and a 2002 Congressional appropriation funds restoration. The APHCC now hosts over 1,000 volunteers each year working on a wide variety of projects: from planting bulbs to resetting tombstones to pruning trees, adopting and landscaping individual plots, providing research, and writing a quarterly newsletter. Events hosted by the APHCC have included free guided tours on Saturdays, Christmas caroling, Christ Church's Easter services, book signings, Pride 5k race and Dead Man's Run 5k race, Day of the Dog Festival, Ghosts & Goblets Gala, and much more. In May 2013, Congressional Cemetery hired Topographix, a firm which surveys cemeteries using ground-penetrating radar, to document burials in the cemetery. Although the cemetery had excellent records going back to its founding, many burial sites lacked a marker or had the marker removed or stolen. Additionally, subsidence of some areas and buckling in others changed the location of graves. The last time Congressional Cemetery was accurately and completely mapped was 1935. By the