News bites: Twitter ups its proposed price range for IPO

Twitter increased the proposed range of its price per share from $17-20 to $23-35, The Wall Street Journal reports.

The Washington Post explains how it knew that the NSA has been tapping into Google and Yahoo's data centers.

A bid to takeover BlackBerry from its largest shareholder fell through late Monday as the company's CEO steps down, The New York Times reports.

The Associated Press speculates about the purpose and future of Google's mysterious four-story structure being built in the San Francisco Bay.