A front-line Ukrainian military unit said it built a new robot that can shoot down Russian aircraft. It is said to be the first weapon of its kind in this conflict.

This small robot trundles down D.C. sidewalks snapping pictures. It’s part of a pilot program that’s helping D.C.’s Department of Transportation update its inventory of street signs.

A front-line Ukrainian military unit said it built a new robot that can shoot down Russian aircraft. It is said to be the first weapon of its kind in this conflict. The remote-controlled robot offers ...