Silver Line bus driver attacked by two men, one armed with a knife

I petaled right past that. Must have been just after it happened. Two police cars, two buses, and a T supervisor who was having problems making a U turn to get to the scene. I was wondering what all the fruhaha was about.
The T inspector/supervisor in the SUV some how got stuck while trying to make a U turn. Which is too silly. There are 4 full lanes. How can you not figure out how to successfully pull off a U turn with that much room. Not really stuck, per say, but they were going to have to wait for the traffic light to change. Unless they wanted to back up.