According to documents obtained by the ACLU, the NSA's problem of collecting unauthorized American phone call data is worse than we first thought. Last May, the NSA deleted more than 600 million call records that it collected in error. The agency claimed that telecoms shared information on calls unrelated to NSA targets, and in doing so, violated federal laws. To be safe, the NSA dumped a massive amount of call records and said it had gotten to the "root cause" of the problem. But a report released by the ACLU, states that just a few months later, the NSA once again obtained information about Americans' phone calls that it was not authorized to collect under Section 215 of the Patriot Act.