Thread:Comments:Gunman commits suicide at University of Texas/How did he make it all the way up to the 6th floor of the Perry-Castaneda library ?

If i recall correctly, they have a security guard at the entrance, at least one who ensures that you're not leaving with books that were not checked out properly. Also, the main lobby is always full of people, so i imagine that entering the library with an assault rifle would not go unnoticed. Then, you have to make it all the way up to the 6th floor. More detail would be nice.