While similar Russian operations inside Ukraine have been rare, the Ukrainian authorities said on Thursday that one of the S.B.U.’s officers from an elite unit was gunned down in daylight in Ukraine’s ...

In the north a 50,000-strong Russian force is attacking Sumy, a provincial capital. Our model is detecting artillery fire and ...

Artificial intelligence supercharges Ukraine's reconstruction effort in a project called Circularity on the Edge, which ...