Today, why the United States is saying goodbye to its pandas. And how the bears became a powerful diplomatic symbol of U.S.-China relations.Read more:For decades, China has deployed its giant pandas as a diplomatic tool to shore up alliances and woo new partners, including the United States. In 1972, China first gifted the United Statestwo pandas. Since then, it has leased pandas to zoos across the country. Now, after American zoogoers have come to adore the bears, China is taking all of its pandas back. This week, under police escort and accompanied by their longtime keepers, Washington’s three giant pandas boarded a FedEx cargo jet at Dulles International Airport headed for Chengdu, China. The only remaining pandas in the nation will be in Atlanta, and they are scheduled to depart for China next year. The pandas’ exit comes at a moment of strained U.S.-China relations. Enterprise reporter William Wan explains the hidden diplomatic power of China’s pandas, and how these black-and-white bears are beloved by Americans across the country.