From “Torturing Iron Man: The Strange Reversals of a Pentagon Blockbuster” by Nick Turse:
“Liberal Hollywood” is a favorite whipping-boy of right-wingers who suppose the town and its signature industry are ever-at-work undermining the U.S. military. In reality, the military has been deeply involved with the film industry since the Silent Era. Today, however, the ad hoc arrangements of the past have been replaced by a full-scale one-stop shop, occupying a floor of a Los Angeles office building. There, the Army, Navy, Air Force, Marines, Coast Guard, and the Department of Defense itself have established entertainment liaison offices to help ensure that Hollywood makes movies the military way.
What they have to trade, especially when it comes to blockbuster films, is access to high-tech, tax-payer funded, otherwise unavailable gear. What they get in return is usually the right to alter or shape scripts to suit their needs. If you want to see the fruits of this relationship in action, all you need to do is head down to your local multiplex. Chances are that Iron Man — the latest military-entertainment masterpiece — is playing on a couple of screens.