Grand Prize of the Jury in Cannes this year, Spike Lee’s BlacKkKlansman tells the incredible true story of Ron Stallworth (John David Washington), the first African- American detective on the Colorado Springs Police Department in the early 1970’s. Greeted with skepticism and open hostility by the department, he bravely sets out on a dangerous mission to make a name for himself: infiltrating the Ku Klux Klan…