don't take pradaxa if you have abnormal bleeding. unexpected signs of bleeding, like unusual bruising. pradaxa may increase your bleeding risk if you're 75 or older, have kidney problems, stomach ulcers, a bleeding condition, or take certain medicines. side effects with pradaxa can include indigestion, stomach pain, upset or burning. ask your doctor about pradaxa. and its specific reversal treatment. >> anderson cooper: nate parker is a 36-year-old actor whose new movie, "the birth of a nation," is about a little-known slave rebellion in virginia in 1831. at early screenings the movie received standing ovations, and in hollywood, long criticized for a lack of diversity, there's been talk of oscar nominations. the slave revolt on which the film is based is a real-life event from the past that nate parker hopes can help blacks and whites confront america's fraught racial present. but an episode from parker's own past is threatening the film's upcoming release, and the filmmaker's future in hollywood. 17 years ago when he was a student