November 7, 2013 5:30 am Twitter Goes Public Trading on the New York Stock Exchange under the symbol TWTR at a starting price of $26 a share, Twitter is being valued at $18 billion based on outstanding stock. US & World Videos 1:12 5 things to know about Tom Thibodeau 2:42 Police find tents of missing Australian brothers, San Diego man surfing in Mexico 21:18 Jim Gaffigan gives hilarious dad advice to Kelly Clarkson audience 9:45 Orlando Bloom says he's shocked he's still alive after filming his new adventure show 2:13 Ryan Gosling talks Emily Blunt's ‘next level' fight scene in ‘The Fall Guy'