At Georgetown, detailed structural plans are not now and have never been open for general research. Actually, little of this type material is kept in the archives. If a researcher presented a convincing case for needing some of the material, I would try to help as much as possible. Simple floor plans and renderings are open. Yes, a clever bomber or thief could fool me. No, I don't think we are going to have a significant impact on events, but we should continue to use our heads. Our ICC building was closed for about 3 hours yesterday by a bomb threat. These are taken very seriously. Average about 3 a year. I have a close friend who is a recently retired FBI scientific investigator and he has been scaring my pants off for about 15 years.