Hammer Heads by Dale Brown

Chronologically "Hammer heads" fits in between "Flight of the Old Dog" &"Day of the Cheetah" & is set in the early 90's when Columbian drugflights were reaching epidemic proportions. Brown's solution is to combinecustoms & coastguards & equips them with hi-tech drones & armed tilt-rotorplanes to intercept the drug flights. Obviously this would be a bit onesided so the "bad guy", renegade Cuban Colonel Augusto Salazaar needs tohave MIGs & Mirages to escort his drug flights with.