Visitors attend giant panda cub's 1st birthday celebration in Washington
People wait in a line before the first birthday celebration of Panda cub Bao Bao at the National Zoo in Washington D.C., Aug. 23, 2014. Some 20,000 visitors are expected to attend the celebration for the first birthday party of the female giant panda cub. (Xinhua/Yin Bogu)
Panda cub Bao Bao plays during a traditional "Zhuazhou" ceremony at her first birthday celebration at the National Zoo in Washington D.C., Aug. 23, 2014. Some 20,000 visitors are expected to attend the celebration for the first birthday party of the female giant panda cub. (Xinhua/Yin Bogu)
People wait in a line before the first birthday celebration of Panda cub Bao Bao at the National Zoo in Washington D.C., Aug. 23, 2014. Some 20,000 visitors are expected to attend the celebration for the first birthday party of the female giant panda cub. (Xinhua/Yin Bogu)
Panda cub Bao Bao plays during a traditional "Zhuazhou" ceremony at her first birthday celebration at the National Zoo in Washington D.C., Aug. 23, 2014. Some 20,000 visitors are expected to attend the celebration for the first birthday party of the female giant panda cub. (Xinhua/Yin Bogu)
Panda cub Bao Bao plays during a traditional "Zhuazhou" ceremony at her first birthday celebration at the National Zoo in Washington D.C., Aug. 23, 2014. Some 20,000 visitors are expected to attend the celebration for the first birthday party of the female giant panda cub. (Xinhua/Yin Bogu)
Panda cub Bao Bao plays during a traditional "Zhuazhou" ceremony at her first birthday celebration at the National Zoo in Washington D.C., Aug. 23, 2014. Some 20,000 visitors are expected to attend the celebration for the first birthday party of the female giant panda cub. (Xinhua/Yin Bogu)
People wait in a line before the first birthday celebration of Panda cub Bao Bao at the National Zoo in Washington D.C., Aug. 23, 2014. Some 20,000 visitors are expected to attend the celebration for the first birthday party of the female giant panda cub. (Xinhua/Yin Bogu)
Panda cub Bao Bao plays during a traditional "Zhuazhou" ceremony at her first birthday celebration at the National Zoo in Washington D.C., Aug. 23, 2014. Some 20,000 visitors are expected to attend the celebration for the first birthday party of the female giant panda cub. (Xinhua/Yin Bogu)
Panda cub Bao Bao (Front) plays besides her mother Mei Xiang during her first birthday celebration at the National Zoo in Washington D.C., Aug. 23, 2014. Some 20,000 visitors are expected to attend the celebration for the first birthday party of the female giant panda cub. (Xinhua/Yin Bogu)
Panda cub Bao Bao plays during a traditional "Zhuazhou" ceremony at her first birthday celebration at the National Zoo in Washington D.C., Aug. 23, 2014. Some 20,000 visitors are expected to attend the celebration for the first birthday party of the female giant panda cub. (Xinhua/Yin Bogu)
Panda cub Bao Bao plays during a traditional "Zhuazhou" ceremony at her first birthday celebration at the National Zoo in Washington D.C., Aug. 23, 2014. Some 20,000 visitors are expected to attend the celebration for the first birthday party of the female giant panda cub. (Xinhua/Yin Bogu)
Panda cub Bao Bao plays during a traditional "Zhuazhou" ceremony at her first birthday celebration at the National Zoo in Washington D.C., Aug. 23, 2014. Some 20,000 visitors are expected to attend the celebration for the first birthday party of the female giant panda cub. (Xinhua/Yin Bogu)