The use of a robot to kill the man who authorities say fatally shot five Dallas police officers has drawn attention in part because it's the first time police have used robots in such a manner.
Below is a series of questions that I have been asked frequently and preliminary answers. The facts remain incomplete, so these are preliminary thoughts.
What happened?
In the wake of the shooting of the Dallas police officers Thursday night during a peaceful protest, police cornered the shooter -- Micah Xavier Johnson -- in a parking garage. After an hours-long standoff that included exchanges of gunfire, they used a robot to deliver an explosive that killed the gunman.