The 48-days July-August annual Hindu pilgrimage, undertaken by up to 600,000 or more pilgrims to high glacial Amarnath cave shrine of iced stalagmite Shiv linga e at in Himalayas, is called Amarnath Yatra. It begins with a mountainous trek from the Nunwan and Chandanwari base camp at Pahalgam and reaches cave-shine after night halts at Sheshnag Lake and Panchtarni camps. The yatra is both a way of earning revenue by the state government by imposing tax on pilgrims, and making living by the local Shia Muslim Bakarwal-Gujjars by taking a portion of revenue and by offering services to the Hindu pilgrims, and this source of income has been threatened by the Islamist Kashmiri Sunni militant groups who have banned and attacked the yatra numerous times, as well as have massacred at least 43 people in Amarnath pilgrimage terrorist-attack massacre (2000) and Amarnath pilgrimage terrorist-attack massacre (2001) causing death of mostly unarmed Hindu pilgrims and 10 Muslim civilians.