Attacks by Ukrainian long-range drones caused flight disruption at Moscow’s main airports for a third straight day on Wednesday as Russia prepared to receive the Chinese president and other foreign leaders for the annual Victory Day military parade in Red Square. Russian flag carrier Aeroflot canceled more than 100 flights to and from Moscow. More than 140 flights were delayed as Russian planes were repeatedly grounded, flight data showed, because of what officials described as the Ukrainian drone threat and amid heightened security measures around the Victory Day events. Russian air defenses repelled an attack by nine drones close to...