Last week saw revelations that the FBI and the National Security Agency have been collecting Americans' phone records en masse and that the agencies have access to data from nine tech companies.
But secrecy around the programs has meant even basic questions are still unanswered. Here's what we still don't know:
Has the NSA been collecting all Americans' phone records, and for how long?
It's not entirely clear.
The Guardian published a court order that directed a Verizon subsidiary to turn over phone metadata -- the time and duration of calls, as well as phone numbers and location data -- to the NSA "on an ongoing daily basis" for a three-month period. Citing unnamed sources, the Wall Street Journal reported the program also covers AT&T and Sprint and that it covers the majority of Americans. And Director of National Intelligence James Clapper himself acknowledged that the "collection" is "broad in scope."
How long has the dragnet has existed? At least seven years, and maybe going back to 2001.
Senate Intelligence Committee chair Dianne Feinstein, D-Calif., and vice chair Saxby Chambliss, R-Ga., said last week that the NSA has been collecting the records going back to 2006. That's the same year that USA Today revealed a similar-sounding mass collection of metadata, which the paper said had been taking place since 2001. The relationship between the program we got a glimpse of in the Verizon order and the one revealed by USA Today in 2006 is still not clear: USA Today described a program not authorized by warrants. The program detailed last week does have court approval.