But Moses had about as much to do with this tragedy as the Pharoah did.
People are quick to blame what they consider lax gun laws for massacres like this, but as you pointed out (at least I think it was you), Washington D.C. has the most stringent gun laws in the country and STILL has more than it's share of gun-related crime.
It's apparent that we also can't depend on legal gun owners to come to the rescue as they are few and far between (and most don't carry their weapons with them). I think that methods to secure all campuses (and maybe even all public buildings) from rampant violence would be more appropriate. Solid, windowless metal doors that can be locked from the inside, a claxon system to warn students (or the general public) that such an event is underway, and perhap emergency radio channels for communications with key personnel in all buildings along with an innocuous duress code would cue authorities to the exact locations of a suspect, along with keeping the public out of harm's way.
I was particularly distressed at this quote from the link:
Papers reserve their sharpest criticism for the 2004 expiration of a 10-year ban on semi-automatic weapons under the then Republican-controlled Congress.
This ban didn't cover semi-automatic handguns, only "military-style" assault rifles with large capacity magazines, so the relaxation of this law wouldn't have had an effect on this incident. The term "semi-automatic" is also a frequent target by those who aren't familiar with firearms and they are usually perceived as machine guns, which is far from the truth. Many sporting arms are also semi-automatic yet are rarely used in instances like this.
Cho Seung-Hui was outgunned by nearly every law enforcement officer on the scene, but the mass confusion and resultant chaos didn't allow them to confront him effectively. The actions of a few of the students who remained clear-headed enough to barricade the doors to the classrooms saved numerous lives, but it's becoming more clear that a standardized contingency plan for these events is becoming a necessity.