Five episodes from the documentary series "Sworn to Secrecy: Secrets of War" reveal once-classified information about how U.S. and Viet Cong forces employed covert techniques during the war. In "Alpha Strike," "Hidden in Plain Sight," "Special Operations," "Johnson's Battleground," and "Ho Chi Minh's Revolution," military experts and eyewitnesses share their insights, with archival footage and once-secret documents adding to the fascinating chronicle. Narrated by Charlton Heston. 4 hrs. total. Standard; Soundtrack: English Dolby Digital stereo.