In Atlanta, Georgia, Mercedes-Benz Stadium is the world's most advanced stadium and features the most complex retractable roof ever built. The new home of the Atlanta Falcons will hold 75,000 fans and use the world's biggest scoreboard, a 360-degree, 62,000-square-foot video screen called a halo board. The construction crew races to finish the $1.5 billion stadium for the 2017 NFL season, facing deadly winds and unique engineering challenges.