In the wake of a December security breach that put up to 40 million credit card numbers and 70 million more pieces of customer contact information in the hands of hackers, Target has been doing damage control. Its installed new credit card security systems, and its chief operating officer resigned in early March. But according to a report from Bloomberg Businessweek, the companys state-of-the-art security system detected the hack as soon as it started — and did nothing. The security system sent out more alerts, each the most urgent on FireEyes graded scale.