National Security Surveillance on U.S. Soil Dropped Again in 2021, Report Say...
https://www.nytimes.com/2022/04/29/us/politics/national-security-surveillance-2021.html
The F.B.I. also tried to estimate the number of its searches for U.S. data in messages gathered without a warrant. But the estimate — fewer than 3.4 million — was murky.
