This is an old joke that has been heard around the Pentagon for some years, now.

One reason the Military Services have trouble operating jointly is that they dont speak the same language. For example, if you told Navy personnel to secure a building, they would turn off the lights and lock the doors.

The Army would occupy the building so no one could enter.

Marines would assault the building, capture it, and defend it with suppressive fire and close combat.

The Air Force, on the other hand, would take out a three year lease with an option to buy.