Forgive me if this was covered, but, I think I know who CROSSWIND is - Flynn’s Ex-partner, Bijan Rafiekian. Makes sense to wiretap him trying to find anything to pin on Flynn. Coincidentally, Rafiekian’s conviction was tossed out.
“ Rafiekian, sometimes referred to as Kian, came to the attention of investigators in the probe into Russian interference in the U.S. election as they collected evidence on Michael Flynn, President Donald Trump's former national security adviser. ”
https://www.nbcnews.com/politics/justice-department/judge-tosses-conviction-against-michael-flynn-s-ex-lobbying-partner-n1058386