on special operations, we turn to former seal team 6 member retired and a half eye commander ryan zinke, now a montana state senator and former army special forces officer retired colonel kalev sepp, he also served in civilian special operations posts in the pentagon. he's now an assistant prove ster-- professor at the navy postgraduate school. and senator, let me start with you. just a short time ago vice president biden call kd the units that pulled off this operation in afghanistan some of the most capable fighting forces in the history of the world. who are they? how do you end up training, being picked for one of these units? >> well, what you are seeing is two tier 1 forces which really represent the best of the navy and the army. on the field side, it takes five years to, in order-- on the seal side it takes five years for when a man says i want to be a navy seal, that process alone is a long and arduous journey. it represents about a 90% attrition rate. and then when you're finally a member of a seal team, is that you have have a couple deployments under your belt, ow you that a

. >> reporter: ryan zinke was a s.e.a.l.er. >> that's why at the end, they're tough guys. when they go toe to toe against somebody there is an absolute belief that they will win. failure isn't an option and guys will not give up, ever. ever. >> reporter: that's why when the target is osama bin laden the president turns to the navy s.e.a.l.s and a special unit, s.e.a.l. team six. wasdin and zinke were both members. >> s.e.a.l. team six is a different unit from the rest of the s.e.a.l. teams and as much as they concentrate primarily on one thing -- counter-terrorism, hostage rescue. >> it's the nation's 911. it's our nation's best that is trained and equipped, led to do the missions of strategic importance worldwide. that's a big responsibility. >> reporter: so how do you prepare to go get bin laden? practice. >> it's perpetual training all the time. that's why america should be proud of these guys. they make their lifestyle so when they get up in the morning they start training and never quit training because the training is

montana state senator ryan zinke, thank you for coming on. >>> and coming up next, we will speak to thewho took care of congresswoman giffords after that shooting in arizona. and we have a never before seen look of those critical hours as crews raced to save her life. and wait until you hear why they had to wait before helping her. >>> and also, 2,0 troops there waiting on the president at ft. campbell, kentucky. we should see the president there in a few minutes. e moy ♪ ♪ounow i ve it too soy ♪ndbrinity y ♪ ♪o♪ sometimes i feel like... mom! ♪ i know i can count on you ♪ sometimes i feel like saying... ♪ mom! mom! [ male announcer ] you know mom. we know diamonds. storewide now through saturday, we'll make this mother's day one she'll never forget. momma! [ male announcer ] that's why only zales is the diamond store. >>> wounded arizona congresswoman gabrielle giffords is moving along and her husband, the commander of the space shuttle david kelmark kelly wen eat last night. she says she will return to florida when the launch, and the space shuttle "endeavour" is rescheduled in florida