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There are four major schools of Tibetan Buddhism: the Gelug, the Kagyu, the Nyingma, and the Sakya. Of these, the greatest impact in the West was made by the Gelug, led by the Dalai Lama, and the Kagyu, specifically its Karma Kagyu branch, led by the Karmapa. As of the early 1990s, there were several significant strands of Kagyu practice in the United States: Chögyam Trungpa's Shambhala movement; Karma Triyana Dharmachakra, a network of centers affiliated directly with the Karmapa's North American seat in Woodstock, New York; a network of centers founded by Kalu Rinpoche. The Drikung Kagyu lineage also has an established presence in the United States. Khenchen Konchog Gyaltsen arrived in the US in 1982 and planted the seeds for many Drikung centers across the country. He also paved the way for the arrival of Garchen Rinpoche, who established the Garchen Buddhist Institute in Chino Valley, Arizona. Diamond Way Buddhism founded by Ole Nydahl and representing Karmapa is also active in the US.