After the attacks of September 11, 2001, the government’s authority to collect, keep, and share information about Americans with little or no basis to suspect wrongdoing dramatically expanded. While the risks and benefits of this approach are the subject of intense debate, one thing is certain: it results in the accumulation of large amounts of innocuous information about law-abiding citizens. But what happens to this data? In the search to find the needle, what happens to the rest of the haystack?

For the first time in one report, the Brennan Center takes a comprehensive look at the multiple ways U.S. intelligence agencies collect, share, and store data on average Americans. The report, which surveys across five intelligence agencies, finds that non-terrorism related data can be kept for up to 75 years or more, clogging national security databases and creating opportunities for abuse, and recommends multiple reforms that seek to tighten control over the government’s handling of Americans’ information.