(male announcer) they are trained to protect and defend. i'm a nuclear surface warfare officer

in the united states navy. i am a first lieutenant for the u.s. army. i'm security forces in the united states air force. i've been in the marine corps for seven years. i'm a coast guard helicopter rescue swimmer. (announcer) disciplined and determined, now they take on a new kind of challenge. the american ninja warrior course is the epitome of all my fitness. we're used to being under pressure. (announcer) tonight, in a special edition, the men and women of the u.s. military take on american ninja warrior. (iseman) whoa. (stratis) i expect to go all the way to the top, move on to vegas. taking it down. [shouts] i'm already an american warrior, and now i'm gonna become an american ninja warrior. (announcer) the heroes have arrived, and glory awaits. (gbajabiamila) you got to want it badly enough. (iseman) yes! [crowd cheering]