THIS GUY WAS AN 0CARE SUPPORTER!!!!!!
No he was not! The man with the semi-automatic rifle was interviewed in a video available on Yahoo! News (where this was a feature story). He clearly stated he was there to exercise his second amendment right to bear arms and to protest against O's health care plan.
BTW, the MSM didn't mention it in their story (it doesn't fit the template), but this rifle-toting protester happens to be black.