I'm going to answer in English because there are technical terms.
For the exterior, humans will only get us so far. That's why we have technology to increase our capability. The exterior, on what can happen out there, is where the technology and the sensing capability needs to take place, whether it comes through cameras or existing technology, as well as effective barriers.
My biggest concern is vehicles being used as threats or weapons, whether they're large or small vehicles being weaponized. In terms of effective barriers and the technology, it's not necessary to have more guns on the Hill—I think we have enough—but we need other things to help.