 Complete the following phrase:  NSW police officers have been involved in many notable events in the states history, including the 1977 Sydney Hilton Bombing, 1986 Investigation into the murder of Anita Cobby, 1989 Grafton Bus Crash, 1989 Newcastle Earthquake, 1994 Arrest of serial killer Ivan Milat, 1997 Thredbo Landslide, 1999 Glenbrook Train Disaster, 2003 Waterfall Train Disaster, 2004 Redfern Riots, 2005 Macquarie Fields Riots, 2005 Cronulla Riots, 2005-2012 Manhunt for Malcolm Naden and 