Prior review is a tool that's a lot less critical when you have an Official Secrets Act; in the US, it's illegal to divulge classified information, and you are

Prior review is a tool that's a lot less critical when you have an Official Secrets Act; in the US, it's illegal to divulge classified information, and you are contractually-bound to seek review of anything you publish, but it's damned hard to unpublish anything that gets out.