They are doing dirty jobs. Lousy stinking dirty jobs they won't be telling their grandkids about any time soon. That's why their wives don't even know what they do for a living. Yep, they're brave. Yep, we're safer because of them. But they want to live, so they're pretty much going to do what they're told.
This country has covered up more illegal and scumbag actions under the guise of national security than any nation on earth.