Russian police officers detain a gay-rights activist during a protest outside the Winter Olympics organizing committee office in Moscow. Clashes over gay rights put NBC in a difficult position: Olympic officials insist that the games should not be politicized, while activists push the network to report on the issue as a journalistic enterprise. Ivan Sekretarev/AP hide caption

itoggle caption Ivan Sekretarev/AP

Buzzfeed is among a growing number of outlets using native advertising online. The ads mimic the site's look and style, and some link to pages almost indiscernible from a typical Buzzfeed page. screengrab/Buzzfeed.com hide caption

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BuzzFeed's content is created by both paid staff members and users of the site. Matt Haughey/Flickr hide caption

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Former News International chief executive Rebekah Brooks has pleaded not guilty to five charges related to the phone hacking scandal. Sang Tan/AP hide caption

itoggle caption Sang Tan/AP