The media is all over this story: Ebola in NYC! Don Weiss, a doctor with the New York City Health Department, faces microphones outside the bowling alley visited by the physician who tested positive for the virus. John Minchillo/AP hide caption

itoggle caption John Minchillo/AP

Twitter is suing the federal government over First Amendment rights. The tech company says the government stopped it from releasing extra detail about government requests for user information. iStockphoto hide caption

itoggle caption iStockphoto

Twitter CEO Dick Costolo says the company has to bridge the gap between the brand's global awareness and user engagement. Ethan Miller/Getty Images hide caption

itoggle caption Ethan Miller/Getty Images

Stephen Colbert responded to criticism about a tweet about his show from his TV network Monday, saying he would dismantle the imaginary foundation that created the stir. Comedy Central hide caption

itoggle caption Comedy Central

GOP Sen. John McCain greets well-wishers as he arrives to visit a pro-European Union rally in Independence Square in Kiev, Ukraine, on Dec. 15. Strong criticism and trips like this landed the Arizona senator on Russia's travel blacklist. Sergei Chuzavkov/ASSOCIATED PRESS hide caption

itoggle caption Sergei Chuzavkov/ASSOCIATED PRESS

Jan. 15, 2009: As the U.S. Airways jet they had been on sinks into the Hudson River, passengers are rowed away. This isn't the iconic (and now copyrighted) photo that helped transform Twitter. But it does give a sense of what it was like that day, 5 years ago. Bebeto Matthews/AP hide caption

itoggle caption Bebeto Matthews/AP

Twitter made its debut on the New York Stock Exchange in November. Both the social media giant and the relative newcomer Snapchat are valued in the billions, but neither company has yet turned a profit. Emmanuel Dunand/AFP/Getty Images hide caption

itoggle caption Emmanuel Dunand/AFP/Getty Images