"Nova" (8 p.m., PBS, check local listings) presents "The Spy Factory," an exposé of the National Security Agency (NSA).
Three times the size of the CIA and many times more secretive, the NSA's own initials have inspired many nervous jokes, such as "No Such Agency" and "Never Say Anything."
"The Spy Factory" looks at two major concerns about the agency. Many worry about its potential to eavesdrop on ordinary Americans' phone calls and Internet activities. But the principal concern addressed in "Spy Factory" is the fact that the agency may be too secretive to be of practical use. (more)
