My first thought was zoomies probably aren’t issued live ammo unless they get to guard those bombers with the doors closed.
Step onto an area marked "Deadly Force Authorized" on some SAC base, and you'd have thought differently. Them SAC sky cops were trigger happy bunch. Someone bought them a bunch of armored cars, which they promptly deemed "War Wagons".
Nowadays, the zoomies are guarding convoys in the Iraqi desert, and not from aircraft either, but the old fashioned way. They call it "in-lieu-of," or ILO, taskings or duties outside their normal Air Force specialties.
Don't know who is keeping the aircraft ready to fly and fight.