What spying apologists don’t tell you about “thwarted plots”

"At the very least, the fuzzy cases Feinstein and Clapper are boasting about demonstrate the need for far more transparency on these tools. If they’re justifying a gross incursion on American privacy, in part because they helped track down an informant our intelligence services lost track of — and created false positives based on hair bleach purchases — then we need to seriously reconsider their use."...Indeed!