Bao Bao the panda leaves the National Zoo, flies to new home in China

Say bye-bye to Bao Bao! The 3-year-old giant panda has left the Smithsonian National Zoo in Washington, D.C., and is flying on a special FedEx aircraft to China. As part of an agreement with the China Wildlife Conservation Association, all pandas born in the United States must return to China before they are 4 years old.