Terrorism and Gun vs Knives

Three men who stopped a terrorist attack in a train in France
Fernando—
This BBC report gives the details where a couple of Frenchmen and three Americans stopped a shooter on a train in France.
According to the BBC athttp://www.bbc.com/news/world-europe-34027051 :
A couple of Frenchmen first encountered the shooter and tried to stop the guy, and one of them was shot, this being just before the Americans became involved. In addition to the shooter having an AK-47: “Mr Molins said the man was also in possession of an automatic pistol, nine cartridge clips, a bottle of petrol and a box-cutter.”
When the Americans reacted, Spencer Stone was the first one to get to the shooter: “"Spencer makes first contact, he tackles the guy, Alek wrestles the gun away from him, and the gunman pulls out a box cutter and slices Spencer a few times.
“Mr. Stone was slashed in the neck and eyebrow with the box-cutter and had a thumb almost sliced off.”
I am sure there are some lessons in this, perhaps one being that just trying to wrestle and choke a bad guy who cannot use his gun is dangerous (including the possibility that they will use some kind of explosive) and that they need to be disabled promptly and not just controlled.
Of course, it was reported that the shooter said he had “found” the guns in a park where he slept, and “He was there just to rob the train.” Wonder why he needed multiple weapons, including the infamous box cutter, if all he wanted to do was rob people?
Larry