The other day in JC2, I found a military base that keeps spawning fighter jets. Or at least, it was doing so initially when I discovered the base. Dozens of jets must have taken off while I softened the place up, tethered bad guys to the jets, tethered jets to the runway, etc. In due course I cleaned the place out, got the 'complete' banner, and moved on. Thing is when I went back there later, there weren't any more jets.
Would this base have kept spawning new jets if I hadn't completed it? Or was there only a finite number of jets to begin with? I wanted to go back and try tying some vehicles to them!
(The base in question was Kem Sungai Sejuk at 17141, 12369).