First lady Michelle Obama announces a campaign to combat the rapidly growing problem of childhood obesity, Tuesday, Feb. 9, 2010, in the State Dining Room of the White House in Washington.

*Michelle Obama will take questions about childhood obesity in her first-ever Web chat tomorrow as part of the launch of her new Let’s Move! Web site.

Moderated by AOL Health, the event will begin at 10 a.m. EDT on Tuesday (July 13) at either AOL or the actual Web site http://www.letsmove.gov/.

You can participate by submitting questions in advance via email to [email protected] (please include your name and town). Or you can ask questions live during the chat through Facebook.