Sounds like security needs to be redone at that building, bet that alarm guard no longer has a job. To be able to smash 3 windows and break into 13 offices, makes quite a alot of noise...
It should not have happened in the first place. That place was like Fort Knox in daylight hours at least in past years.
There is not just one security guard, it would be a system of security to get through first. Breaking windows and getting into SAIC would be about as easy as doing the same in any defense industry building in D.C.