Nightly News | January 17, 2012
>> two american icons are celebrating big round-number birthdays today. how about that couple? both are beloved by millions of americans. for starters, the champ turned 70 today. we got a glimpse of muhammad ali on saturday surrounded by his family. preparation for his big day . and perhaps you saw the tribute in prime time last night on nbc. a tribute to betty white who turned 90 today and could still put most of us to shame. happy birthday to both of the greatest.