Russia launched its biggest missile and drone attack on Ukraine so far this year on Tuesday, according to Ukrainian authorities, cutting heat to tens of thousands of people and ending a brief reprieve agreed to by Moscow and Washington as Ukrainians grapple with plummeting winter temperatures.

President Volodymyr Zelenskiy accused Russia on Tuesday of exploiting a U.S.-backed energy truce to stockpile munitions, and using them to attack Ukraine with hundreds of drones and a record number of...

The developers behind Ukraine's interceptor drones are working to ensure that these cheap air defense tools don't become obsolete.