"But in the end we found nothing."

That is literally the bottom line of a report.

For 30 years, NEST undercover teams have combed suspected sites looking for radioactive material, using high-tech detection gear fitted onto various aircraft, vehicles, and even backpacks and attaché cases. No dirty bombs or nuclear devices have ever been found - and that includes the post-9/11 program. "There were a lot of false positives, and one or two were alarming," says one source. "But in the end we found nothing."

No warrants.
None needed, they say.
Hmm.
Sleep well, America. Big Brother is watching more than we know.