Robotic Exo-Skeleton already in use by humans

I do not know if you remember the movie Aliens, where Sigourney Weaver takes down an alien with an exo-skeleton. Well, here it is, a prototype that is actually being used in the army. These exo-skeletons can lift heavy objects, and overall achieve monstrous strength while shielding an individual. Therefore this suit can be used not only for combat but also laborious work. Picture a world without physical stress in a work environment. Here is a link to the a video showing the suit in action:http://www.cnn.com/video/#/video/tech/2007/11/27/yeates.ut.robo.soldier.ksl