"A military operation involves deception."
He could be telling the truth, he could be lying... A drone programmed to automatically boot up , check its location, and if it's at the right coordinates, take off and crash at some other coordinates (the airfield) is more satisfying to "fans" of automated warfare.
For extra fun, add some other code to "look for plane-like objects to crash into", but now you're approaching dangerous territory of "What if a civilian 737 happens to be boarding at this airfield"...
The reports also mention the truck roof opening remotely, one could also use GPS coordinates to trigger this. But doing it manually from a distance, after checking the surveillance cameras that the coast is clear, is more reliable.
I guess they used smartphones and SIM cards with mobile data for the remote communication...