 Complete the following phrase:  Karmens documentary methods were both influential and controversial; his renowned technical ability captured the emotion of war and the repetition of key shots and framings between film projects became a hallmark, but he would often blur the lines of Cinéma vérité by restaging key battles, including the lifting of the siege of Leningrad Ленинград в борьбе, 1942, the Viet Minh victory at the siege of Dien Bien Phu Вьетнам, 1955, and the 1956 landing in Cuba of 