[pacificmint]

I think it might be a typo that was supposed to say VIP Movement.

I've heard ATC use that term when Air Force One was in the area. They won't say who specifically is there, or even that it is AF 1, but instead just say that air space is closed "due to VIP Movement".

I don't think it means they care more about safety when a VIP is around, rather that a VIP movement might shut certain other operations down, which increases the overall workload for ATC.

For example they sometimes (or always?) stop all ground traffic from even moving while AF 1 is taxiing, landing or taking off.