Greetings, I'm working up a mission where a helicopter swoops down and land in front of a taxiing AI Learjet, causing the plane to stop and thus preventing some bad guy's nefarious plans…you get the picture…I think I've seen a variation of this a dozen times on various TV shows and movies. The idea is to prevent the bad guy's escape. Put a property trigger on the Learjet, - if it stops (Ground Speed ≤ 2 kts) the goal is achieved. I use Obviously I tried using the Yield to User function to get the plane to stop…and that doesn't work…the lear taxied merrily right through my helo sitting on the ground in front of it. Settings: AIType - Airplane AIAircraft Unit_Mode - Waypoints YieldToUser - True AircraftAIState - Flight I also tried AircraftAIState - Taxi no difference. So I changed to AIType - GoundVehicle Now it stops for the blocking helo…but it has no lights. Thoughts?