Final answer:
Operation Desert Storm, which took place during the 1991 Gulf War, is the only mission not part of the Vietnam police action.
Step-by-step explanation:
All the following missions were a part of the Vietnam police action except for Operation Desert Storm. Operation Rolling Thunder was a sustained bombing campaign during the Vietnam War that lasted from 1965 to 1968. Operation Linebacker II was another series of air attacks during the Vietnam War in December 1972. However, Operation Desert Storm refers to the 1991 Gulf War, which was not related to the Vietnam War. Operation Hanoi Hilton is not a military operation but a nickname for the Hoả Lò Prison in Hanoi, where many U.S. prisoners of war were held during the Vietnam War.