The U.K. has launched Project Nightfall, a competition to rapidly develop new long-range ballistic missiles for Ukraine. The missiles will be able to travel 500 km (310 miles) and come equipped with a 200 kg (440 lb) warhead.

Russia has repeatedly struck Ukraine’s power plants, substations and transmission lines with missiles and drones, seeking to knock out electricity and heating and hinder industry during the nearly fou...

After one particularly heavy night of missile and drone attacks last week, 70% of the capital was left without power for several hours.