Members of the Air Force Academy Class of 2018 formed a giant push-up chain in an attempt today, to break the Guinness World Record for the largest chain push-up. Unofficially, 918 Basic Cadets completed three push-ups in the attempt at the Air Force Academy in Colorado Springs, Colo. Guinness will examine photos and video to decide in coming months if the Basics broke the previous record of 138 people set in 2012. (AP Photo/The Colorado Springs Gazette, Mark Reis)