On September 26, 2017, the IAF was requested by US Embassy through Ministry of Defence to help in locating and rescue of US citizen Ms Margaret Allen Stone. Ms Stone had set out for trekking in the Ladakh region and had been held up in Zhingchan area at a distance of 75 Km from Leh since September 6, 2017 due to injury. Her condition had deteriorated during this prolonged period of lack of care. She was in a critical condition. The US Government informed IAF of the situation in the afternoon hours on 26 Sep 17.
IAF responded to the situation with requisite alacrity. Exact location of Ms Stone was ascertained with the help of civil administration and by evening two IAF helicopters were able to locate Ms Stone in the valley. Ms Stone was brought to the safety of Leh hospital for medical care by sunset on September 26, 2017.