The Hollywood cavalcade descended on Cannes Saturday for the premiere of Leonardo DiCaprio and Martin Scorsese's Native American crime epic, "Killers of the Flower Moon." The three-and-a-half-hour movie, which includes Scorsese's other long-time muse Robert De Niro, charts a wave of murders among the wealthy Osage Indians in the 1920s and the birth of the FBI. After hours of waiting in the rain that has drenched the French Riviera town all week, fans went wild as DiCaprio, De Niro, and Scorsese arrived for the premiere alongside several native Americans in traditional outfits. Jesse Plemons, who is also in the film,...