When making a movie about any real historical tragedy, especially if it’s recent, there’s an onus on the people behind the project to be true to the material. No one in Hollywood, save for maybe the Afflecks, loves Boston more than Mark Wahlberg, and he’s said before that his prime concern with making Patriots Day, a drama about the Boston Marathon bombings, is “getting it right.” A new trailer before this week’s release of the film hammers that point home even further, with footage from the movie intercut with statements from the real people who were there that day.

Wahlberg and director Peter Berg worked closely with the members of law enforcement and officials who experienced the Boston Marathon bombings firsthand to get their depiction of the events as true to life as they could. All of the main characters of the film are based on real people, and the new trailer brings them on camera to talk about the loss and heroism in the wake of tragedy, and the strength of the human spirit.

In the aftermath of an unspeakable attack, Police Sergeant Tommy Saunders (Mark Wahlberg) joins courageous survivors, first responders and investigators in a race against the clock to hunt down the bombers before they strike again. Weaving together the stories of Special Agent Richard DesLauriers (Kevin Bacon), Police Commissioner Ed Davis (John Goodman), Sergeant Jeffrey Pugliese (J.K. Simmons) and nurse Carol Saunders (Michelle Monaghan) this visceral and unflinching chronicle captures the suspense of one of the most sophisticated manhunts in law enforcement history and celebrates the strength of the people of Boston.

Patriots Day opens in select theaters December 21, and goes wide January 13, 2017.

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