it comes from the name of a giant in french literature -- gargantua. how about... is it... [ bell rings ] the answer is -- "gnu," a large african antelope with an ox-like head. as in, "what's new at the zoo?" "a gnu." so, how'd you do? that's "word" for now. ne >> they've led the country. how much you know about them? here's this week's chance for you to guess the president. he was a football star at the university of michigan. he led the country after the first-ever resignation by a president -- nixon, who left office because of a scandal. he forged a nuclear weapons agreement with our cold war rival the soviet union, and he fought rising prices with a program called "whip inflation now" -- "w.i.n." our 38th president, gerald r. ford, made an unpopular decision to pardon president nixon, but though he lost his campaign to stay in office, his successor praised him for healing the country. >> it's a job that originated way back in history and is still practiced the world over today. laura has the story. >> people training dogs to fetch, sit, and roll over is nothing

it comes from the name of a giant in french literature -- gargantua. how about... is it... [ bell rings ] the answer is -- "gnu," a large african antelope with an ox-like head. as in, "what's new at the zoo?" "a gnu." so, how'd you do? that's "word" for now. hands can do incredible things. now they can even help save a life, with hands-only cpr. if you see an adult suddenly collapse, just call 911 then push hard and fast in the center of the chest until help arrives. learn more at handsonlycpr.org. man: i propose 3 cheers for those we leave behind. hip hip hooray! [cheering] father: congratulations. it's in paper now. [laughs] great job. congratulations. i'm proud of you. all right. oh, fine. ensign elliot. who's gonna salute him? guys, who gets to salute him first? these people really needed us and i was going to make a difference, right here in my community. announcer: be there for your community, at nationalguard.com. >> they've led the country. how much you know about them? here's this week's chance for you to guess the president. he was a football star at the