Video of the drill was posted on Youtube and is now making waves.

At least one passenger FOX 10 spoke with said people were scared when the drill took place in the middle of a terminal last week, past the security checkpoint.

TSA said this kind of drill has been going on for years but this is the first time some are seeing it, thanks to a passenger who took video.

Video taken at Phoenix Sky Harbor Airport, September 22 showed TSA employees ordering passengers who had already gone through the security checkpoint to stop in the middle of the terminal.