Also, this from a commenter at HotAir.com yesterday (good info as you read this article)
And a photo of the building with that second story door
Enough speculation. I got an e-mail from a VT student tonight that answers a question I asked in another thread — namely, why Cho did his killing on the second floor of Norris Hall instead of the first. Reader Geoff writes:
I have a couple classes in Norris and can answer why Cho stayed on the 2nd floor. Norris is located on a slight hill and is shaped like an L. If you make an L in your left hand using your index finger and thumb, you get a general layout of Norris. Your index finger sits on top of the hill and runs parallel to the hill. Your thumb runs perpendicular to and down the hill.
The two main entrances to Norris are at the tip of your index finger and the tip of your thumb. If Cho entered at the entrance that is at the tip of you index finger, he would be on the second floor without climbing any stairs.
If he entered at the entrance that is at the tip of your thumb, he would be on the true first floor, and would have had to climb up the stairs to reach the 2nd floor. Seeing that my classmates he killed were not on the 3rd or 1st floor, I assume he entered at the entrance at the tip of your index finger.