This is totally incomprehensible. After the lesson we learned in Virginia Tech, it has occurred again. I would have thought security in schools will be upped from April 16 2007, but I guess I was wrong. From this, I have learned that there is no safe heaven for anyone, and if terrorists see this happening, they will take advantage. We just have to be MUCH more aware of our surroundings so these senseless crimes from suicidal killers (whether or not they are extremists, or mentally ill) will not kill innocent people in prestigious areas again.