A U.S. congressional committee has asked Sony Computer Entertainment to explain the massive potential leak of information on customers of its PlayStation Network. The network, which serves as an e-commerce and online gaming platform for the PlayStation 3, has been offline for more than a week after an intruder broke through its cyberdefenses and into the network. Sony has warned its 77 million subscribers that their personal information may have been leaked, including, potentially, credit card numbers. A subcommittee of the House of Representatives’ Committee on Energy and Commerce sent a letter to Sony.”]