We are very, very far from any situation that would justify the execution of American citizens. To even mention executing anyone is irresponsible bullsh*t
Actually some of these @%%#01e$ need to be arrested alive, by I'll grant you whatever means necessary, and waterboarded to find out who they work for, as if we didn't already know.
Then throw their butts in jail for a very long time, a very unpleasant jail, and take all their stuff.