Of all the film festivals held around the world each year, one holds a certain amount of prestige -- the Cannes Film Festival , which is held in a city of the same name in France. The international film festival was held for the 71st year this May, and at it, a film called “Peacekeeper” was screened. The 13-minute-long documentary is about the Dakota pipeline, and the response of the Native Americans who live on the land that would be developed for the project.