a. A jet plane smashing into the WTC
b. A gun is put to the head of the Congresswoman you are visiting
c. Two cars ahead someone brakes suddenly and a guy smacks your car from the rear.
Which happened first?
Interestingly enough many people wouldn't be able to tell you if any two of those events occurred on the same day.
Here we have a situation where people are in fear of their lives, a guy is just pumping out rounds and people are falling, and sure you may have seen a pistol at the Congresswoman's head, but she could have been third in line ~
The police will interview everybody on the scene to get a clearer picture.
Definitely not c because I couldn’t get 25 people into my car.