New Delhi, July 3, July 4 -- As the annual Amarnath yatra started on Friday, Prime Minister Narendra Modi has written a special letter to devotees, describing the annual pilgrimage as "a great blessing" and calling upon pilgrims to transform their spiritual journey into a collective commitment towards cleanliness, safety, local livelihoods, environmental conservation, and nation-building.In the two-page message titled "A Letter from the Hon'ble Prime Minister to the Pilgrims", PM Modi greeted devotees with "Har Har Mahadev" and "Jai Baba Barfani", saying the pilgrimage to the Amarnath cave shrine in Jammu and Kashmir represents India's enduring spiritual and cultural traditions."Participating in the Amarnath Yatra in Jammu & Kashmir is, i...