Atlanta’s Mercedes Benz Stadium has released a new video showing the structure’s unique aperture-style retractable roof closing for the very first time. Designed by 360 Architecture (now a part of HOK), the eight ETFE-clad roof “petals” slide along tracks on the stadium roof to come together at a central point, much like how a camera operates. When fully operational, the roof will be able to open and close in less than eight minutes.