As near as I can tell, nearly 100 "Fast and Furious" guns have been picked up by law enforcement in Arizona. 60 were pulled out of the back of a van in Phoenix. About 35 were confiscated in a raid on a house in Nogales, AZ and one AK was abandoned along with 40 pounds of Marijuana in the desert near Ajo. Another 30 or so guns, some AKs, some ARs were confiscated a few years ago from a "rip crew" in Casa Grande but there was never any confirmation in the press whether these were F&F guns but anyone want to guess? At a certain point the press stopped mentioning whether weapons confiscated by law enforcement were associated with the federal governments efforts to arm the drug cartels. So maybe they're all gone now but some of us doubt it.
All of this makes for a curious fact about AZ gun shows. You very rarely see anyone trying to sell a used AK. A lot of people are concerned about the provenance of anything that isn't passing through an FFL. When buying an AK in AZ, the 4473 is your friend.
I am positive I heard a report a year or so ago that an F&F gun was used in murders in Mexico. Most countries would consider that an act of war.