There is something unsettling about the prospect of fleets of bomb-defusing robots wheeling around pedestrian sidewalks on their unknown delivery missions. I

There is something unsettling about the prospect of fleets of bomb-defusing robots wheeling around pedestrian sidewalks on their unknown delivery missions. If these become ubiquitous, they'd also provide a ready cloak for anyone wishing to detonate a bomb without any link to the crime or chance of harming themselves.