the radiation had decayed. Waste containers were shipped to Hunters Point Shipyard, then loaded onto barges for transportation to the Farallones. Containers were weighted with concrete. Those that floated were sometimes shot with rifles to sink them. Forty-four thousand containers were dumped at , and another 3,500 at . In January 1951, the highly radioactive hull of USS Independence, which was used in Operation Crossroads nuclear weapons testing and then loaded with barrels of radioactive waste, was scuttled in the area. Its wreck was rediscovered in 2015. The exact current location of the containers and the potential hazard the containers pose to the environment are unknown. According to the EPA, attempts to remove the barrels would likely produce greater risk than leaving them undisturbed. Shipwrecks The islands are the site of many shipwrecks. The liberty ship SS Henry Bergh, a converted troop carrier, hit West End in 1944 (all hands were saved). The USS Conestoga, a US Navy tugboat that disappeared with its 56 crew members in 1921, was found in 2009 and positively identified in 2016. (The Conestoga had sailed from nearby San Francisco, but the waters of the Farallones were never searched because the vessel was assumed to have traveled far out into the Pacific.) On the morning of August 5, 1941, a United States Coast Guard Douglas Dolphin, V-126, likely struck a rock pinnacle on the southeast Farallon island, causing the aircraft to burst into flames. All 3 crewmen aboard were killed. Computer scientist Jim Gray was lost at sea after setting out on a solo sailing trip from San Francisco to the Farallones on January 28, 2007. Despite an unusually thorough search, neither his body nor his boat was ever found. On April 14, 2012, the sailing yacht Low Speed Chase capsized during a race at Maintop Island, killing 5 of the 8 crew aboard. Swimming records Three people successfully swam from the Farallones to the Golden Gate, with two more swimming to points north of the gate. The first, Ted Erikson, made the swim in September 1967, with the second, Joseph Locke, swimming to the Golden Gate on July 12, 2014, in 14 hours. The third person, and the first woman to complete the distance, Kimberley Chambers, made it in just over 17 hours on August 7, 2015. Protected area The collecting of eggs along with the threat of oil spills from San Francisco's shipping