Our base has a mix of civilian and military security - the gates are always manned by at least one of each, including staggered concrete barriers and a fortified drop down gate at the end of the staggered concrete barriers.
It is a matter of putting the lives on the line of hundreds of military assigned to our base, hundreds more from other service branches doing war-games and 4 thousand civilians. I know tomorrow things may look nearly the same, but I can promise that we all will be under the eyes of cameras in the security department WHICH film just about every inch of the base and I suppose random car stops will restart - something we haven't had in a while.
In my 19 years with the Navy, I have been car seached 15 times, more that my coworkers, but such is the luck of the draw - lol. It is a mild inconvienience, well worth the effort if it stops one maniac from doing something horrific.