BLARNEY is a communications surveillance program, started in 1978 and operated under FISA . The collection takes place at top-level telecommunications facilities within the United States, choke points through which most traffic will flow, including wireless. This type of surveillance is referred to as "Upstream Collection." It was first brought to public view in a PRISM slide revealed by Edward Snowden. Among the facilities associated with BLARNEY are AT&T's Room 641A in San Francisco, California, revealed in 2006 by Mark Klein, and another in New Jersey. Like its counterparts, BLARNEY was expanded after the September 11 attacks.