you're right, there's still on-going controversy with fort hood, but the administration classified that as workplace violence, even though there are other signs in that case that suggest it is terror. >> and greg. >> who is armed and not armed in places like these? are there a lot of people that are packing or just a few people? >> reporter: i'll give you the example of andrews air force base when we go and fly somewhere with president obama. there are a significant number of military personnel there who are armed, and thankfully i've never seen an incident anywhere close to this at a place like andrews. we travel with the president around the country and around the world to u.s. military installations. i have always seen them to have a heavy security presence, so how he was able to get through what i would anticipate would be more than just one checkpoint is something that's going to be looked at closely. >> all right. that's all the time for you. thanks for being with us. directly ahead, greta van susteren is on scene at the washington navy yard and she's