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Rested, bright eyed and bushy tailed. the newest member of the obama family showing too much puppy love in the white house. and next half hour, dont forget about the morning glass of orange juice. how about taking a shower with it? it is the latest health trend. the vitamin c shower. you are watching "world news now." >> announcer: "world news now" continues af

♪ >> classic. love that song. >> even in the barking fashion. >> yep. >> what do you get when you mix jingle bell holiday spirit with a bouncing new puppy. >> at the white house it wasnt canine carolling but it added to the festivities. the first lady kicked off the holiday season at the executive mansion. and of course anything involving a puppy usually makes it "our favorite story of the day." heres mary bruce. >> reporter: someone maybe a little too excited for the holidays. sunny, the newe...

Tape, seemingly fast asleep. many victims of something called micro-sleep. episodes of sleep as a few seconds. your eyes could be open but your brain is asleep. >> micro-sleep is a brief transition from wakefulness to sleep. it can last up to maybe 20 to 30 seconds. >> reporter: tuesday night i found out firsthand when investigating the effect of sleep deprivation on driving. staying awake 30 hours and wired up behind the wheel on a test track. i thought i had done okay but my brain scan showed ...