These are the backup tapes of every game in the NBA’s archives. The best players, iconic games and classic moments of basketball history live inside a nuclear bunker. The rare footage of Bill Russell, Wilt Chamberlain and Kareem Abdul-Jabbar and today’s highlights of LeBron James, Stephen Curry and Giannis Antetokounmpo share an unlikely home 50 feet below ground. The facility, built in the 1960s by AT&T, is now operated by a data protection and disaster recovery firm called Vital Records, Inc. It stores millions of tape cartridges in a heavily controlled, intensely monitored environment meant to survive when nothing else does.