In a historic move, three giant pandas bid farewell to their home at the Smithsonian National Zoo in Washington, D.C., as they embarked on a journey back to China. The departure of Tian Tian, Mei Xiang, and their youngest cub, Xiao Qi Ji, signifies the end of a more than 50-year tradition of housing Chinese pandas at the renowned zoo. The black and white bears were carefully transported from...