Beginning in 1986, the US supplied the mujahideen with its state-of-the-art heat-seeking missile, the Stinger, which the Afghans employed with devastating effect. In the first use of the Stinger in Afghanistan, mujahideen fighters downed three of eight unsuspecting Soviet Mi-24 Hinds as they approached the airfield at Jalalabad on a late September afternoon. Some scholars point to that event in 1986 as the turning point in the war. Moreover, for most of the remainder of the war when Stingers were known to be present, Soviet and Afghan aircraft elected to remain at higher altitudes where they were less vulnerable to the missile, but also less effective in ground attacks. Although employed extensively throughout the war as a ground attack platform, the Hind suffered from a weak tail boom and was found to be underpowered for some missions it was called upon to perform in the mountains of Afghanistan, where high density altitude is especially problematic for rotary-wing aircraft.