Robot-maker Sean Bielat says he's fine with the Dallas Police Department's apparently unprecedented use of a bomb-disposal robot to kill a gunman on Thursday. "A robot was used to keep people out of harm's way in an extreme situation," said Bielat, the CEO of Endeavor Robotics, a spinoff of iRobot's military division. "That's how robots are intended to be used."

Joergen Pedersen, the CEO of RE2 robotics and the chairman of the National Defense Industrial Association's robotics division concurred. "If these robots are used in manners for which they were unintended, we would expect that the officers who are there to keep citizens and themselves safe would use good judgment where the application of lethal force is a last resort," he said.

On Sunday, speaking to Face the Nation, Dallas Mayor Mike Rawlings blessed the operation. "The chief had two options and he went with this one. I supported him completely because it was the safest way to approach it," he said.

But some ethicists are worried.