umpqua. now that campus is closed until at least monday because it's an active crime scene. students who survived remain in shock about what happened for them, what they witnessed. for first year students, it was just the fourth day of being on campus for class. earlier i spoke to two students, sara cobb and cassandra weldings. they innocently thought the sound of gunfire could be the noise of a dropped book. but when the screams started, they knew it was something much more dangerous. >> i thought it was like a loud book that dropped or maybe the teacher dropped something on the ground or, you know, i just thought it was a table. and then i knew something wasn't okay, all of our classmates were just doing our homework on the computers and we pretty much knew something wasn't okay because we heard within five seconds two more and more and