have fought intermittently since April 1984. Both countries maintain a permanent military presence in the region at a height of over . Both India and Pakistan have wished to disengage from the costly military outposts. However, after the Pakistani incursions during the Kargil War in 1999, India abandoned plans to withdraw from Siachen without official recognition of the current line of control by Pakistan, wary of further Pakistani incursions if they vacate the Siachen Glacier posts without such recognition. Prime Minister Manmohan Singh became the first Indian Prime Minister to visit the area, during which he called for a peaceful resolution of the problem. After that present Prime Minister Narendra Modi also visited this place. President of Pakistan Asif Ali Zardari also visited an area near the Siachen Glacier called Gayari Sector during 2012 with Pakistan Army Chief Gen. Ashfaq Parvez Kayani. Both of them showed their commitment to resolve the Siachen conflict as early as possible. In the previous year, the President of India, Abdul Kalam became the first head of state to visit the area. Since September 2007, India has opened up limited mountaineering and trekking expeditions to the area. The first group included cadets from Chail Military School, National Defence Academy, National Cadet Corps, Indian Military Academy, Rashtriya Indian Military College and family members of armed forces officers. The expeditions are also meant to show to the international audience that Indian troops hold "almost all dominating heights" on the key Saltoro Ridge and to show that Pakistani troops are nowhere near the Siachen Glacier. Ignoring protests from Pakistan, India maintains that it does not need anyone's approval to send trekkers to Siachen, in what it says is essentially its own territory. In addition, the Indian Army's Army Mountaineering Institute (AMI) functions out of the region. Peace Park proposal The idea of declaring the Siachen region a "Peace Park" was presented by environmentalists and peace activists in part to preserve the ecosystem of the region badly affected by the military presence. In September 2003, the governments of India and Pakistan were urged by the participants of the 5th World Parks Congress held at Durban, to establish a peace park in the Siachen region to restore the natural biological system and protect species whose lives are at risk. Italian ecologist Giuliano Tallone said the ecological life was at serious risk, and proposed setting up a Siachen Peace Park at