Ukraine on Thursday launched its largest drone attack on Moscow in years, sparking fires, hitting a major oil refinery and forcing evacuations at the country’s largest airport. Russia vowed to retaliate for the attack as AFP reporters saw dramatic scenes of black smoke billowing over the capital’s southern skyline and drops of black rain mixed with soot falling from the sky. At least 17 people were wounded in the strikes, which also set a shopping centre and apartment building ablaze, authorities said.