Deep in the confines of the United Center lies a binder of undeveloped photos. It lives in a corner of the Chicago Bulls offices, and only appears during office tours for those who ask about it. The binder contains thousands of images reliving the Bulls’ finest years: Dennis Rodman posing off-the-court alongside Hulk Hogan, Scottie Pippen in mid-game action. And, of course, footage of Michael Jordan as the centerpiece of the Bulls’ championship runs in the 1990s. Luka Dukich, the Bulls director of digital content, knows how special the photos are. “We were sitting on this treasure trove of content that people hadn’t seen before,” he said.