I saw this first on Gateway Pundit. The photos at that site were blurry enough to be on par with Sasquatch sightings and I don't know enough about Secret Service procedure to make a judgment so I decided to do some research. (& yeah, yeah, I know...you can take the girl out of the library, but you can't take the library out of the girl, etc...)
I found a few sites talking about the incident and then this video...
Obama rolls by in his limo about 40 seconds into the video and at about 1:38, a dark sedan passes the camera, back window rolled down. You can hear some people in the crowd begin to exclaim after they realize there was an agent in the back seat pointing a rifle at them. This is vastly different than the standard image of a member of the U.S. Secret Service Counter Assault Team in the back of a motorcade SUV. Also, why is the man in the sedan so far back from the Obama's limo? He's almost a minute behind - too far, perhaps, to actually protect the president.
(And as a somewhat amusing aside, at 1:57 you can hear a woman quote Rule 1.)
I have mixed feelings.
Yes, the president needs a security detail and yes, these are brave men and women, willing to risk their lives to protect him...but is it necessary for federal agents to openly sweep innocent American citizens, peacefully assembled as is their right, with loaded weapons?
Has intimidation become standard procedure?