Indie distributor Abramorama has acquired global distribution rights to “The Outsider,” a documentary that reveals the challenges to curate and construct the National 9/11 Memorial and Museum in lower Manhattan.

The film’s directors Pamela Yoder and Steven Rosenbaum, the team behind “7 Days In September” and “Overcome,” have spent 20 years archiving and documenting the Sept. 11 terrorist attacks and are considered the world’s leading historians on the tragedy.

Following a live streaming premiere on Aug. 19 at 8 p.m. Et, which includes a special panel, “The Outsider” will launch nationwide on Aug. 20 through Abramorama’s Watch Now @ Home Cinema Release. In early September, the film will play in select theaters and on video-on-demand.

The film includes never-before-seen footage collected over eight years and follow’s the journey of the museum’s creative director Michael Shulan from the day of 9/11 to the building’s opening in 2014. During that time, the filmmakers were given unlimited access to the site,...