The TSA wasn't exactly forthcoming, was it?
TSA provided data two years after request
In October 2010, The Salt Lake Tribune made a Freedom of Information Act request for TSA data about numbers of prohibited items, by type, surrendered at security checkpoints at each U.S. airport. Almost exactly two years later, the TSA provided data for 2005-2010. While The Tribune requested data in electronic format, TSA provided paper printouts, which required entering it by hand into computers for analysis. The newspaper combined this information with data for 2002-04, which was obtained earlier.