There is no reliable way to calculate from the number of recorded compliance issues how many Americans have had their communications improperly collected, stored or distributed by the NSA.

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

As digital communications have multiplied, and NSA capabilities with them, the agency has shifted resources from surveillance of individual targets to the acquisition of communications on a planetary scale.

The NSA is forbidden to 'target' American citizens, green-card holders or companies for surveillance without an individual warrant from a judge.

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

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