Notice that it wasn't placed in Nichols engineering building. My guess- a First Class engineer for his senior project? It's not like they have any attachment to Preston Library which is the domain of the liberal arts majors who actually study (the rest of the LA population are hanging out in the PX slurping coffee or in barracks watching netflix on their computers ). Seriously- very weird goings on.Who would try to bomb the greatest place on Earth? Sick terrorists.....