I just played a skirmish as I am still learning the game. I deployed two F15's to a spot on the map thinking that they would patrol and shoot at targets of opportunity they found. There were lots of choppers out and occasional Migs making a run at me. The F15's just flew in circles and never engaged anyone who was within range of them. Is this normal? I noticed my A-10's would circle and engage any vehicle the ventured into their range.