I don’t see how either. In the bases I have lived on following 9/11, they have installed even more security features, as well. If someone were to manage to get past the guards without being stopped, there are stops that have been installed to prevent whoever it is from getting any further. It’s not like our military hasn’t considered that someone may try to storm a gate. I don’t know about Army bases (when we were at Ft. Sill for training, it was pre-9/11, and there was NO security at the entrances at all), but the USMC still uses Marines at their gates, and plenty of them.
One day I followed a motorcyclist up to the gate at Schriever, which is out on the prairie in the middle of nowhere. The sole guard was on the phone, and therefore wasn't visible to approaching motorists. The motorcyclist, not seeing him, proceeded through the gate. The guard was out in a flash, calling in a an alert on his radio while a heavy steel barrier rose up out of the road in front of the motorcyclist. Military police cars came flying from the base, and the motorcyclist (fortunately in uniform) was doing some very chagrined aplogizing as the gate guard eyed me sternly and let me pass.
Civilian gate guards have been hired in many cases to take up some of the workload caused by greatly expanded security measures, and they're all armed.
American Quilter gave a great description of how hard it is to get through a gate on Army installations now.
Trouble is, once you get past them by, say, crawling under a barbed wire fence on the backside of the post, you are in a target rich environment. Military and civilian personnel working on base, as well as those families living in housing, are all unarmed.
The weapons are locked up in arms rooms in barracks, and the ammunition is stored in bunkers half-way across post from the weapons.
The MPs will eventually get to a shooter, but they are the only ones armed and response time will vary anywhere from 30 seconds to 10-15 minutes depending upon the location of the shooters and the nearest MP unit.
A big thanks to your husband AND you for your service.