In 2000 the Vancouver Police Department established a specialized drug squad, "Growbusters", to carry out an aggressive campaign against the city's estimated 4,000 hydroponic marijuana growing operations (or grow-ops) in residential areas. As with other law enforcement campaigns targeting marijuana this initiative has been sharply criticized. , Vancouver had the ninth-highest crime rate, dropping 5 spots since 2005, among Canada's 35 census metropolitan areas. However, as with other Canadian cities, the overall crime rate has been falling "dramatically". The rate of firearm related violence dropped from 45.3 per 100,000 in 2006, the highest of any major metropolitan region in Canada at that time, to 16.2 in 2017. A series of gang-related incidents in early 2009 escalated into what police have dubbed a gang war. Vancouver plays host to special events such as the Asia-Pacific Economic Cooperation conference, the Clinton-Yeltsin Summit, or the Symphony of Fire fireworks show that require significant policing. The 1994 Stanley Cup riot overwhelmed police and injured as many as 200 people. A second riot took place following the 2011 Stanley Cup Finals. To reduce the public health risk from discarded hypodermic needles which are commonly found on the streets of downtown and the adjacent Downtown Eastside, the city runs a continuous collection effort, recovering approximately 1000 needles per day from public spaces. According to Vancouver Coastal Health, the regional health authority and a distributor of clean needles to intravenous drug users, there has never been a documented case of disease transmission from an accidental needlestick. Military Jericho Beach in Vancouver is the location of the headquarters of 39 Canadian Brigade Group of the Canadian Army. Local primary reserve units include The Seaforth Highlanders of Canada and The British Columbia Regiment (Duke of Connaught's Own), based at the Seaforth Armoury and the Beatty Street Drill Hall, respectively, and the 15th Field Regiment, Royal Canadian Artillery. The Naval Reserve Unit is based on Deadman's Island in Stanley Park. RCAF Station Jericho Beach, the first air base in Western Canada, was taken over by the Canadian Army in 1947 when sea planes were replaced by long-range aircraft. Most of the base facilities were transferred to the City of Vancouver in 1969 and the area renamed "Jericho Park". Education The Vancouver School Board enrolls more than 110,000 students in its elementary, secondary, and post-secondary institutions, making it the second-largest school district in the province. The district administers about 76 elementary