If you’ve seen Top Gun or Transformers, you may have wondered: Does all of that military machinery on screen come with strings attached? Does the military actually get a crack at the script? With the release of a vast new trove of internal government documents, the answers have come into sharp focus: the US military has exercised editorial control over thousands of films and television programs. As these activities gain new public scrutiny, new questions arise: How have they managed to fly under...