Exactamundo. It's called "cover for action".
Trooper: "What the hell you boys doing down here? Didn't you see that restricted sign up there?"
Arab: "We get call on cell phone, man with Cadiallac has broken down, needs tow. He say come here, now he is gone."
Very plausible ready made cover story to be anywhere snooping around, and testing security and access for the possible truck bomb route.