U.S. Air Force Maj. J.R. Williams, Thunderbird 6, opposing solo, signs a Thunderbird F-16 model for a fan during an autograph session at the Royal Air Force Waddington International Air Show, United Kingdom, July 2, 2011. The Thunderbirds will perform in nine countries during their six-week European tour, fostering international goodwill and representing America's airmen around the globe.