An official of China's Giant Panda Protection and Research Center introduces Dujiangyan Panda Base to David Rank (C), the charge d'affaires of the U.S. Embassy in Beijing, in Sichuan province, China. (Photo: Reuters)
David Rank, the chargé d'affaires of the US Embassy in Beijing, has left the State Department over the Trump administration's decision to quit the 2015 Paris agreement to fight climate change, a senior US official has said.