This could have been that guy's last earthly moment, had they been American swats up there. I'm just guessing they are the hotel's regular Scottish security for the building. Could be wrong. Certainly hope they were not USSS. if so, they could have shot the balloon and he would have fallen to earth. But as I think that through, not knowing if he was armed or suicide vested, they should have taken him out. Look how close he came not just to the President, but several of his top aides who were still on the lawn.