Even if one agrees that FISA and the applicable minimization procedures were likely observed in the Flynn case, that should be the beginning, not the end, of the analysis.
Secrecy & Leaks
As long as there are governments, there will be government secrets—and there will also be leakers and whistleblowers. Recent high profile disclosures by Private Chelsea Manning and former National Security Agency contractor Edward Snowden have renewed national discussion of the proper limits of American intelligence authorities and the proper limits of secrecy. They have reinvigorated also the debate over what tools prosecutors and agencies ought to use in identifying and prosecuting those who violate government confidences.