An old Air Force recruiting video in which a military instructor claims trainees are in better shape than most Marines just won’t go away. The Air Force removed the video from its website in 2009, but it in the world of social media, nothing really dies, so it was recently resurrected on Facebook. The 57-second video of trainees exercising is narrated by an unnamed elite “blue rope” military training instructor, who says that a common misconception is that the Air Force has the easiest PT standards of the military services. “Actually, we are the hardest when it comes the PT…