Washington's National Zoo bid a tearful farewell to its beloved trio of giant pandas on Wednesday as the long-serving goodwill ambassadors to the U.S. capital began a journey back to China that was announced earlier this year. The bears - Mei Xiang, Tian Tian and their cub Xiao Qi Ji - hunkered down in crates made of steel and plexiglass that were lifted into a truck and then loaded into a Boeing 777F cargo plane dubbed "FedEx Panda Express." The pandas, accompanied by three zookeepers, will travel to a reserve in China’s mountainous Sichuan province, where an estimate...