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Watch Sworn to Secrecy: Secrets of War Season 4 Episode 4 Online

  • 6/10
  • COUNTRIES: United States of America,South Korea,United Kingdom,France,Germany,Russia,Vietnam
  • Subtitles: English

An examination of the secret deployment of modern aircraft designed to spy from the sky. From remotely piloted vehicles on today's battlefield to the venerable U-2 and the SR-71, spy planes have long been the most vital top covert aircraft in the sky.