The document provides information about the Hemisphere Project, a secret program run through the Los Angeles Clearinghouse and funded by ONDCP and DEA. It collects call detail records from phone carriers using AT&T switches and stores over 4 billion records daily in its database, accessible through administrative subpoenas. The program aims to identify replacement phones, additional phones used by targets, and international phones. It provides results quickly and in useful formats. Since 2007 it has processed over 4,400 requests and 11,200 phone numbers. It is most used by DEA and DHS for identifying new phones and tracking known Canadian phones in the US. The document also discusses how the program protects its data and methods.