The latest news on NSA
Paul has recruited 'hundreds of thousands' of plaintiffs.
The NSA doesn't collect content of conversations it gathers unless the participants are tied to terrorist activities.
Bush appointee cites Fourth Amendment, stays injunction pending appeal.
Eight tech companies including Google, Yahoo challenge NSA.
State senator says 'the NSA isn't welcome in Arizona unless it follows the Constitution.'
Limits on NSA 'will give people more confidence' on spying, Obama said.
Top intelligence community lawyer says people outside the U.S. are the only ones who need to worry.
Activists say legislation can cut water, kill snooping at the Utah Data Center.
Proposal would apply U.N. human rights rules to digital privacy.
Network spying could discourage $35 billion in cloud-computing sales through 2016.