Ask yourself if the law preventing upstanding citizens from carrying concealed weapons at the Navy Yard prevented Aaron Alexis from murdering 12 and wounding 3 with a shotgun.  The answer is clear. 

Next, ask yourself if allowing lawful concealed carry MIGHT have prevented some of those deaths/injuries.  That answer is also clear. 

Lastly, ask yourself what risk a law-abiding citizen with a permit poses to people in a state building.  The answer is "none".  So why should this law be allowed by the people?  The answer is, it should not.

Criminalizing lawful activities is an act of tyranny and Virginia is such an awesome "free" state that we should be above such restrictions.  No citizen in good standing should be prohibited from self-protection just because they enter a state owned facility.