Ukraine relied for decades on Russia to fuel its vital nuclear power plants, but now there's fear Moscow could use the facilities as a weapon of war.

Russia unleashed a missile attack on cities across Ukraine before dawn on Thursday, killing two people and wounding at least 20 others, Ukrainian authorities said. The country’s air force said it shot down 36 of the 43 Russian cruise missiles that were fired “in waves” from 10 strategic aircraft at 3.