From the unconventional and awe-inspiring to the hilarious and heartwarming, here's a look at some of the most interesting photos, videos and stories that have our newsroom talking today. What's capturing your attention, filling your inbox and cluttering your Facebook/Twitter feed? Tweet us the stories you're talking about using #InstantIndex or email us at ABC.WorldNews@abc.com and they could appear on World News.

The Oracle Tweets Warren Buffett, the 82-year-old oracle of Omaha, joined Twitter today. The first tweet for the man who doesn't even have a computer in his office was five simple words: "Warren is in the house."

Image credit: Andrew Harrer/Bloomberg via Getty Images

New Heights The 75-foot-tall silver spire that will sit atop One World Trade Center was hoisted to the top of the building today. When it is installed it will make One World Trade Center the tallest building in America at 1,776 feet.

Image credit: Spencer Platt/Getty Images