this for us. >> why is it so important to get back up again and feel that spirit of competition after a devastating injury? >> you know what, it is not just a physical thing. it's a mental thing, it's a support thing, and you see it when you're out there. it's incredible to watch these guys and there's nothing like little spirit of competition to get these people motivated. that's really what the warrior games was all about. created as a way to motivate these service men and women with their recovery, not just physical. the games giving them an emotional boost as well. >> reporter: they marched on colorado springs. the drums of battle igniting the warrior within. this time these service men and women who once fought side by side will be competing against each other. >> being lazy has not been an option. i've been busy training for this thing. >> reporter: david oliver is ready. so is marine captain jonathan disbro. >> i wasn't really an athlete