A Tibetan Buddhist monk holds up a candle with other Tibetan exiles during a candlelight vigil for Tibetan Janphel Yeshi, who set himself on fire earlier in New Delhi. Strdel/AFP/Getty Images hide caption

itoggle caption Strdel/AFP/Getty Images

Yen Jinchao, one of the farmers who signed the secret document in 1978. Jacob Goldstein/NPR hide caption

itoggle caption Jacob Goldstein/NPR