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New investigation into the 51-day siege of the Waco Branch Davidians. Who actually started the shoot-out that led to the death of 86 cult members and federal agents?

Also in this programme: the controversial World War Two pope, Pius XII – was he really anti-Semitic? Isabel Hilton talks about her new book about China and Tibet's continuing dispute about who is actually the real Panchen Lama, the Dalai Lama's second in command? Buddhist monastery celebrating the first European high lama.