USPS cancels Saturday delivery service. AP

Burger King to return to France to battle McDonald’s. Businessweek

Pinterest looking to be valued at $2.5 billion. WSJ

Facebook will be more transparent about tracking users. NY Times

The U.S. Federal Reserve also hacked. Guardian

Google wins case that frees it from responsibility for ads’ messages. Reuters

iTunes hits 25 billion song downloads. Apple

Twitter CEO Dick Costolo on why Vine is the next big app. The Verge

Which advertiser found the most success with Super Bowl hashtags. Twitter