LONDON -- Russia and Ukraine exchanged large waves of attack drones overnight into Sunday as the two combatants maneuvered ahead of Friday's planned summit in Alaska between U.S. President Donald Trump and Russian President Vladimir Putin. Ukraine's air force said Russia launched 100 drones into the country overnight, of which 70 were shot down or otherwise suppressed. Thirty drones impacted across 12 locations, it said in a statement posted to Telegram. Russia's Defense Ministry said its troops shot down at least 126 Ukrainian drones overnight. Temporary restrictions on flights were introduced at airports in the southwest of the country in Vladikavkaz, Grozny, Saratov and Kaluga, Russia's federal air agency Rosaviatsiya said, during the attacks. In Saratov, regional Gov. Roman Busargin sa

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