FILE - In this Sept. 25, 2015, file photo, panda cub Bao Bao, roams in an enclosure at the Smithsonian's National Zoo in Washington. Bao Bao is scheduled to depart the zoo Tuesday, Feb. 21, 2017 for a one-way flight to China, where the 3-year-old will eventually join a panda breeding program. (AP Photo/Manuel Balce Ceneta, File)
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