repair more than 200 holes in YFD-2 to float her again. Repaired, the YFD-2 raised the USS Shaw for 10 days of repairs to install a new temporary bow so Shaw could return to the naval shipyard at Mare Island at Vallejo, California for final repairs. YFD-2'' was used for salvaging and repairing many of ships damaged on 7 December 1941, as she could raise any ship here, other than the large new battleships. Post World War II, in the Korean War (1950–1953) some ships in the United States Navy reserve fleets returned to active duty after being overhauled at the shipyard and Sea trial by the base. With the Vietnam War (1955–1975) the base was again busy with support efforts. The Cold War (1947-1991) and the 600-ship Navy had Naval Base Hawaii active. December 4, 2019 shooting On December 4, 2019, a 22-year-old, male sailor opened fire with his M4 carbine service rifle, killing two Department of Defense civilian workers and injuring another, then immediately killed himself with his Beretta M9 service pistol. A Pacific Air Chiefs Symposium was hosted at the naval air station during this time. Officials and military leadership from 18 nations across the Indo-Pacific gathered for the 2019 Pacific Air Chiefs Symposium at Pacific Air Force Headquarters from December 3 to December 6. It was hosted by General David Goldfein, US Air Force Chief of Staff and General CQ Brown Jr., PACF Commander. Image gallery See also Naval Base Hawaii US Naval Advance Bases USS Arizona Memorial Pearl Harbor National Memorial References United States Navy shipyards Installations of the United States Navy in Hawaii Buildings and structures in Honolulu County, Hawaii Economy of Hawaii Pearl Harbor