I have no evidence of any relationship between IRS and NSA.

NSA surveillance is a complex subject - legally, technically and operationally.

The NSA has different reporting requirements for each branch of government and each of its legal authorities.

The NSA's business is 'information dominance,' the use of other people's secrets to shape events.

There's a long history of private-company cooperation with the NSA that dates back to at least the 1970s.

The Obama administration has provided almost no public information about the NSA's compliance record.