The music got me at first - "that sound's familiar" I thought, kind of like Sail by Awolnation. Then while I am watching this it occurs to me it isn't just being strong and physically fit that makes these guys special. It's also the training and practice with all the different types of equipment that are available. It's one thing to know in theory how to rappel out of a helicopter, it's quite another to be able to do it right when it needs to be done. Likewise with guns and electronic equipment. It's one thing to be able to sit down at your leisure and puzzle out how to make the thing work, but it's another to able to employ it effectively when you are under a little pressure, not to mention when you are under fire.
15 hours ago