Instant Index: World AIDS Day Marked With Tributes Across Globe

David Muir reveals the top stories that have people buzzing this week.
3:00 | 12/01/13

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Transcript for Instant Index: World AIDS Day Marked With Tributes Across Globe
our "instant index," what's trending here on a sunday night. And across the globe tributes marking the fight against aids. World aids day, marked by symbolic red ribbons. This one draped in front of the white house and this one, worn by students in south korea. The u.N. Saying aids-related deaths dropping by 30% from last year from 2005. Well, a flashback to the '80s TONIGHT. Remember trying to solve those rubik's cubes? It's back. An artist turning this office building into a giant glowing cube. It challenges even the pros. Trying to crack the code with a hand-held remote control. Turning the city skyline into a giant video game. And how about the tv viewers who tuned in for the news and did a bit of a double take in north dakota this weekend? Stunned by the fill-in anchor man. The one and only ron burgundy. There's that three-piece suit and will ferrell at the anchor next, next to amber schatz, who struggled to keep her composure at times, but burgundy was in his element. You look lovely tonight. Thank you. Are you married? No. Well, I am. So don't get any ideas. Somebody didn't tell him it's NOT THE '70s ANYMORE. Burgundy anchored the entire show. Of course, the new movie "anchorman 2," out right before christmas.

This transcript has been automatically generated and may not be 100% accurate.

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