Famous hacks include a weather balloon labeled "MIT" appearing at the 50-yard line at the Harvard/Yale football game in 1982, the placing of a campus police cruiser on the roof of the Great Dome, converting the Great Dome into R2-D2 or a large yellow ring to acknowledge the release of ' and ' respectively, or placing full-sized replicas of the "Wright Flyer" and a fire truck to acknowledge the anniversaries of first powered controlled flight and the September 11th attacks respectively.