WASHINGTON — First lady Michelle Obama kicked soccer balls with youngsters to encourage them to get the recommended hour of daily exercise as she promoted her campaign against childhood obesity. Mrs. Obama's participation in a soccer clinic Friday in Washington coincided with the announcement of a new partnership between the U.S. Soccer Foundation and the National Alliance for Hispanic Health. The groups are launching a 25-city tour to provide children and their families with free health screenings and soccer clinics. It's part of the first lady's "Let's Move" anti-obesity effort.