Indeed. It makes total sense why that plane was up there. The next thing conspiracy theorists tend cite about the plane is perceived shiftiness from the government about what the plane does and why it was up there. Apparently conspiracy theorists have never heard of OPSEC.

As for the article I've noticed how CNN leaves "news" like this on their site for days at a time. Although I thought the video did an ok job of providing at least an explanation. Not long after it went up on CNN a thread opened over at ATS.com. I have not browsed it yet but you can bet it's along the lines of the plane was there to facilitate 9/11.