The Drug Enforcement Agency has released to EPIC a new FOIA production about the AT&T "Hemisphere" program. Hemisphere is a massive call records database made available to government agents by the nation's largest telecommunication company. AT&T discloses to the government billions of detailed customer phone records, including location data, without judicial review. The new release to EPIC reveals that both the FBI and CBP obtained access to these call details records. EPIC filed suit against the DEA in 2013 after the agency failed to respond to EPIC's FOIA request for information about the Hemisphere program. EPIC previously argued that the names of other agencies with access to Hemisphere records should be released. In June, the Supreme Court held in Carpenter v US that government access to location data is a search subject to Fourth Amendment review. EPIC filed an amicus brief in the Carpenter case.