In the "Secrets of War: Vietnam" episodes from 1998, "Hidden in Plain Sight" and "Special Operations," viewers will learn about the covert missions and incredible gadgets used by spies during the controversial conflict. Both programs contain rare archival footage and enlightening interviews. Seven-disc set also includes "Vietnam War Stories" and "Vietnam: America's Conflict." 32 2/3 hrs. total. Standard; Soundtrack: English Dolby Digital stereo.