Which can be interpreted as the US should have sold attack Apaches or Blackhawks with stand off missiles & upgraded the Pakistani Orions to be used for overland surveillance rather than sell F-16s.
I'm guessing Sukhoi, but I bet the F-16's were promised to Pakistani from day one for their help in Afganistan. They wanted and needed F-16 spares so badly before 9/11 that I can't believe the issue wouldn't have come up from the start.