She has become a champion for fighting childhood obesity since moving into the White House. And First Lady Michelle Obama led from the front as she showed off her sporting prowess at an event in New Orleans today. Mrs Obama, 46, is well known for her regimented fitness regime. And she certainly looked full of energy as she took part in a sports day at the city's Woldenberg Park. Mrs. Obama and former Indianapolis Colts coach Tony Dungy visited Woldenberg Park, along with former New Orleans Saints running back Deuce McAllister and former Tampa Bay linebacker Derrick Brooks. Her visit...