With its shady green canopy and centuries-old medicinal lore, the Chinese long ago bestowed the name "tree of heaven" on ...
(Manuel Balce Ceneta/AP)
February 1, 2013
Secretary of State Hillary Rodham Clinton, center, smiles as she bids farewell to State Department employees at the State Department lobby in Washington, Friday, Feb. 1, 2013, before departing the State Department for the final time as secretary of state. (AP Photo/Manuel Balce Ceneta)