Military Helicopters Buzz The Blatnik Bridge in Duluth [VIDEO]

I was crossing the Blatnik Bridge yesterday when I noticed something I had never seen before.

To my right were, what appeared to be, three military blackhawk helicopters flying in a group several hundred feet to the south of the bridge.

It certainly was a cool sight and something you don't see everyday, so I thought I would share. Did anyone else see them?