After more than 30 years of policy work, government experience, teaching and research, I see no mystery here. Concealment, deception and outright lies have characterized U.S. national security policy for decades – from the overthrow of democratically elected governments in Iran and Guatemala to the overthrow of Saddam Hussein and more.
https://theconversation.com/from-vietnam-to-afghanistan-all-us-governments-lie-128695