As policemen, they are trained to shoot only as a last resort, when there is a direct threat to life; the police sharpshooter has a well-known rule: "Be prepared to take a life to save a life." Police snipers typically operate at much shorter ranges than military snipers, generally under and sometimes even less than . Both types of snipers do make difficult shots under pressure, and often perform one-shot kills. Police units that are unequipped for tactical operations may rely on a specialized SWAT team, which may have a dedicated sniper. Some police sniper operations begin with military assistance. Police snipers placed in vantage points, such as high buildings, can provide security for events. In one high-profile incident commonly referred to as "The Shot Seen Around the World" due to going viral online, Mike Plumb, a SWAT sniper in Columbus, Ohio, prevented a suicide by shooting a revolver out of the individual's hand, leaving him unharmed. The need for specialized training for police sharpshooters was made apparent in 1972 during the Munich massacre when the German police could not deploy specialized personnel or equipment during the standoff at the airport in the closing phase of the crisis, and consequently all of the Israeli hostages were killed. While the German army did have snipers in 1972, the use of army snipers in the scenario was impossible due to the German constitution's explicit prohibition of the use of the military in domestic matters. This lack of trained snipers who could be used in civilian roles was later addressed with the founding of the specialized police counter-terrorist unit GSG 9. Longest recorded sniper kill The longest confirmed sniper kill in combat was achieved by an undisclosed member of the Canadian JTF2 special forces in June 2017 at a distance of . The previous record holder was Craig Harrison, a Corporal of Horse (CoH) in the Blues and Royals RHG/D of the British Army. In November 2009, Harrison struck two Taliban machine gunners consecutively south of Musa Qala in Helmand Province in Afghanistan at a range of or 1.54 miles using a L115A3 Long Range Rifle. The QTU Lapua external ballistics software, using continuous doppler drag coefficient (Cd) data provided by Lapua, predicts that such shots traveling would likely have struck their targets after nearly 6.0 seconds of flight time, having lost 93% of their kinetic energy, retaining of their original velocity, and