Was there truly a landing of armed marines by helicopter outside CIA headquarters, followed by a storming of the building?

This was not what it seems on the surface. This is not a coup-type event or a military takeover or in any way an act to counter the force of the cabal or the grip of the extraterrestrials on the intelligence community. This was part of a training exercise that was done as a security precaution should there be a hostile act against the CIA headquarters at Langley. So this is something that they have planned for and are simply going through the motions to see how the system is working—will there be a timely response; will the personnel know what to do and take action in a quick fashion, and so on. This was very analogous to a school holding a fire alarm drill, so it is not a portent of any impending situations either positive or negative for the future.