This tragic situation, a planned hit by multiple assailants, has many unanswered questions which may never be answered.
We don't know whether Mr. London's pistol was on his person when the attack began or how long it took him to get it into action.
We don't know whether he had already been shot one or more times before he got off his single round. (How much malfunction clearing practice have you had after being shot? How limp might your wrist be if you fired while falling after being shot?)
We don't know, therefore, whether the outcome would have been any different had he been armed with a revolver, a pump shotgun, a larger caliber or an Uzi.
What we do know is that he resisted armed violence twice in a short period of time - once successfully and, tragically, once unsuccessfully.
As I see it the lesson is plan, train, practice situational awareness and do your best. Your chances are a lot better that way, but there are no guarantees.
The rotten, low-life maggot punk got one thing right: it's up to the court now. May the judge and jury have as much guts as the Londons.