HOMESTEAD, FL - NOVEMBER 20: First Lady Michelle Obama talks with military families on behalf of 'Joining Forces' - a group that helps military families - before the NASCAR Sprint Cup Series Ford 400 at Homestead-Miami Speedway on November 20, 2011 in Homestead, Florida. Obama and Dr. Jill Biden will also serve as grand marshalls of the race. (Photo by Chris Trotman/Getty Images for NASCAR)
