US First Lady Michelle Obama on Thursday visited the World Expo in Milan, which is themed this year on food, on the lookout for ideas to help fight childhood obesity. Along with daughters Sasha and Malia, and her mother Marian Robinson, healthy food campaigner Obama spent the entire morning at the exhibition. Accompanied by Agnese Renzi—the wife of Italian Prime Minister Matteo Renzi—she met with children and students at the Italian and American pavilions. "The truth is we still have so much work to do when we are seeing rising obesity rates, not just in the United States but all over the w