The Dalai Lama marks his 90th birthday with a statement asserting sole control over his succession and reincarnation. As New Delhi moves to support the Tibetan spiritual leader living here in exile, and Beijing says it will enforce its approval over a successor, could India and China’s new found road to normalcy turn rough? And given the US’s position - what are the geopolitical effects of the succession debate? We have exclusive impressions from my trip to Lhasa.