“The Whistleblower”, new yesterday on Netflix Instant. Here is a film to fill you with rage. It is based on the true story of Kathryn Bolkovac (Rachel Weisz), a police officer from Lincoln, Neb., who accepted an offer to join the U.N. peacekeeping mission in Bosnia. While there, she uncovered direct evidence that underage girls were being held captive and bought and sold in a profitable sex trafficking operation. When she presented her evidence to her superiors, it was ignored. When she persisted, she was fired. There is more. The American private security firm, DynCorp International, whose operatives committed these crimes and tried to cover them up, is still employed by the U.S. government in Iraq and Afghanistan, and was used in Louisiana after Katrina. Although its activities were at the center of Bolkovac’s report, she found that local police and U.N. peacekeepers themselves were also deeply involved.