The audience gave a standing ovation to the documentary After Tiller, which premiered Friday at Sundance. The buzzy and controversial film is about the four U.S. doctors who still give late-term abortions. Given its subject matter, security was heightened for the doc's debut, with extra security detail employed, metal detectors set up at the theater's entrance, and attendees receiving pat-downs before entering. The four doctors that served as subjects in the film were also on hand for a Q&A session afterwards. One doctor, Dr. Warren Hern, called the film "very important," as it's the first that "tried to listen to the patients and the doctors about what they're doing."