Does it disturb anybody else that if 1 half determined terrorist can do this, what could a bread truck with 15 very determined men could do with this kind of security, and now I would think, other terror types are saying " hey, man could we do better than that ". Sounds like a small team could easily take over key points of the base. I know red cell did it just to test base security in the past.
There should be at least 2 on guard duty per 100 acres armed with rifles and side arms. More at entrances and exits to sensitive areas or armories. More MP's would be ok, but grunts on guard gives them something to do at less expense and training.
It would be a waste of resources, I read Marcinko's book (a couple of times

) The primary factor that Red Cell worked with was the ultimate unbeatable enemy. ROUTINE. The fact that 99.9999% of people doing security patrols never encounter anything of real significance makes it totally impossible for even the best trained, most highly motivated personnel to stay completely alert all the time.
Even in combat zones, guys fall asleep on watch. Boredom and routine were 2 of the key elements of Red cell success.
Think about this, enlisted persons, including sentries are required to salute all Officers and their vehicles, if you are walking a post some where and a vehicle approaches your attention is on the Base sticker to see if it's an officer or not. Bin Laden, Obama or some other notorious America hater could be driving and unless you recognized the car itself you might not notice. (Hey, That's my commander's car, who's that driving it )
The only way to increase safety is to discharge all suspicious troops (Muslims ) and require all troops to be armed while on duty and allow Concealed carry off duty.