Reading this article from today’s USA Today, I came across this gem-
Unable to get comfortable with what NSA was proposing, Qwest’s lawyers asked NSA to take its proposal to the FISA court. According to the sources, the agency refused.
The NSA’s explanation did little to satisfy Qwest’s lawyers. “They told (Qwest) they didn’t want to do that because FISA might not agree with them,” one person recalled. For similar reasons, this person said, NSA rejected Qwest’s suggestion of getting a letter of authorization from the U.S. attorney general’s office. A second person confirmed this version of events.