[tubebender]

If this person was a trained sniper he wouldn't be using .223/5.56.

Be thankful he is not using a .50 cal...

[Eagle Eye]

Yeah, those .50's will go through a person, sixteen walls, three cars, ricochet up and bring down an airliner.

Plus they are highly concealable, cheap, quiet, and most .50 cal owners are unknown to each other.

[Indie]

A trained hit man, sniper, etc uses the equipment and caliber that is right for a particular situation and environment. In fact most assasins do use small calibers (.22L) because of their accuracy. They also transfer their energy entirely to the target and do a little dancing around inside. This is either 1. an Arab terrorist(s) or 2. someone in the government (NSA, etc) who is acting with full backup resources and lots of help. And because of the .223 caliber used (which Klinton wanted to ban), I can not overlook the political potential involved for an inside job to further leftist political agenda. It is not an angry white male, a disgruntled right winger...etc. IMHO.