Women

First lady Michelle Obama, left, and Serena Williams talk during a U.S. Open tennis clinic highlighting the importance of physical activity for kids at Billie Jean King National Tennis Center in New York, Friday, Sept. 9, 2011. (AP)

NEW YORK (AP) -- First lady Michelle Obama says she hopes to still be playing tennis when she's 90.

Obama visited the U.S. Open for the first time Friday to promote her campaign against childhood obesity and praise the U.S. Tennis Association's initiative to build kid-sized courts.