WASHINGTON--First Lady Michelle Obama hits McCormick Place on Thursday morning on her "Let's Move" anti-obesity third anniversary tour where she will be joined by tennis champ Serena Williams and other sports figures to urge more physical activity for kids in schools. For details, click over to letsmoveschools.org

ON THE HOMEFRONT: Mrs. Obama arrived in Chicago on Wednesday night, traveling from Mississippi, where she highlighted healthy school meals. ABC7 News reported that Mrs. Obama overnighted at the family Kenwood home after dining with a friend at RPM Italian, the River North eatery.

This is Mrs. Obama's second visit to Chicago this month. She returned earlier for the funeral of Hadiya Pendleton, the 15-year-old gunned down in a park about a mile from their Kenwood house.

From the White House: "First Lady Michelle Obama will return to her hometown of Chicago to make a major announcement to bring physical activity back to schools. The First Lady will be joined by Secretary of Education Arne Duncan, Chicago Mayor Rahm Emanuel, NIKE, Inc. President & CEO Mark Parker, Dominique Dawes, Gabby Douglas, Allyson Felix, Bob Harper, Bo Jackson, Colin Kaepernick, Sarah Reinertsen, Paul Rodriguez, Serena Williams, a surprise musical guest and thousands of Chicago area teachers and students at the event hosted by the American Alliance for Health, Physical Education, Recreation and Dance (AAHPERD) and the Alliance for a Healthier Generation."