According to Producer Erwin Stoff, the diplomatic compound and CIA annex were built using the actual plans. "What we did, is we had actual plans and satellite images of the original structures, and we had the guys. So we built these, we replicated both the annex and the diplomatic mission exactly to the inch."
In a January 18, 2016 interview on the Mark Levin radio program, Mark Geist said he sneaked in during filming, and took the place of Max Martini, the actor portraying him. Michael Bay didn't notice until Geist looked at the camera.
According to Mark Geist in a January 18, 2016 interview on the Mark Levin radio program, the mortar rounds that hit the roof had a kill radius of 21 feet, meaning anybody within 21 feet of a round was as good as dead.
Glen 'Bub' Doherty (played by Toby Stephens) was also one of the Navy SEAL snipers involved with freeing Captain Richard Phillips from Somali pirates in 2009. He, along with 2 other SEAL snipers, shot the Somalian pirates through a tiny window in the escape craft as it bobbed up and down. All without harming the Captain as he was held hostage.
Michael Bay wanted to shoot on film. Director of Photography Dion Beebe wanted to shoot digitally. Bay ultimately accepted digital filming because of the number of night scenes, and the tight production schedule.
Michael Bay said that filming in Malta, he used a film crew he'd never used before. Bay claimed that an international crew, working so well together, telling a story centered on Americans, was a tribute to the universality of the story.
According to Pablo Schreiber (who plays Kris "Tanto" Paronto) in a January 13, 2016 interview, he received three injuries during the course of making 13 Hours. To stay in shape for the role he would lift weights and ended up injuring his back while doing dead lifts. He later tore his MCL cliff jumping and then a couple days later, broke his wrist. Schreiber received the broken wrist from sitting on the open tailgate of a pickup truck. When the driver of the truck gunned the engine, Schreiber flew off the back which resulted in his injury. He had to wear a hard shell brace that was flesh toned to conceal the injury. Schreiber stated they took out the brace in post production but there are still some scenes where it is visible. Particularly the scenes where the operatives are guarding the annex.
The opening text says virtually all foreign embassies in Libya closed. The embassy of Malta, Libya's northern island neighbor, stayed open throughout this period. Malta is also where much of the movie was filmed.
The day before the ceremony took place, the Academy decided to rescind Greg P. Russell's Oscar nomination for Best Sound Mixing. The decision was made because Russell violated Academy campaign regulations, since he contacted voting members to make them aware of his work on the film and his nomination. Campaign regulation prohibit telephone lobbying. Russell shared his nomination with fellow sound mixers Gary Summers, Jeffrey J. Haboush and Mac Ruth, who all remained eligible for the award.
The trivia items below may give away important plot points.
Sean Smith was an avid gamer. His favorite massive multi-player online role-playing game (MMORPG) was EVE Online, where he attained almost legendary status as the character "Vile Rat." His death resulted in several community tributes online.
During the rescue attempt, there is a scene when a Libyan fight introduces himself to John Krasinkis character 'Jack Silva', he states "Hello Captain America". John Krasinski auditioned to play Captain America for the Marvel Cinematic Universe but the role eventually was given to Chris Evans