Watch: Two giant pandas Bao Li and Qing Bao arrive in Washington National Zoo

Bao Li and Qing Bao, a panda pair, arrived at Washington, DC's National Zoo. They are part of a 10-year China-US breeding and research agreement. The pandas will undergo a 30-day quarantine before their public debut in January. Panda diplomacy has been a symbol of peace and friendship for China since 1957.