<p>Aren’t all floors of all buildings impossible to scale without a pass-card/key? Seems these four would never have been able to go up the elevator. Same should be to enter at any level using the stairs. </p>
<p>Also, don’t all the buildings have double entrances [pass-card/key required to open doors at each?] with cameras everywhere to document who is going in and out of the building at all times? Tech needs to have the same level of campus security as does Penn, USC, Johns Hopkins and other prominant universities in very tough cities…</p>