The reason the U.S. Armed forces have difficulty in coordinating and cooperating with each other is that they do not use the same jargon and misunderstandings frequently occur. For example...
If you tell the Navy to secure a building, they will simply turn out the lights and lock the door.
If you tell the Army to secure a building, they will occupy the structure and permit only persons with the proper pass to enter.
If you tell the Air Force to secure a building, they will take out a three year lease with an option to buy.
If you tell the Marines to secure a building, they will call for an air strike, assault the structure with heavy artillery, ground and small arms fire, capture the facility, fortify and hold the ground at all costs until properly relieved. SEMPER FI.