I doubt it.
Apparently these guys were entering the port facility delivery area (out going shipment?).
If they were there to pick up a Nuke they would not need three guys.
A Nuke would likely be in a containerized shipment.
The truck would show up without a container on it with receipt paper work. The truck would be loaded with the container. The truck would leave with the Nuke still in the container.
You would almost certainly be caught if you tried to unload the container in the port area.