Warsaw will hand over four of the Soviet-made warplanes "within the next few days," President Andrzej Duda said, and the rest needed servicing but would be supplied later. "They are in the last years of their functioning, but they are in good working condition," Duda said. Duda said Poland's air force would replace the planes it gives to Ukraine with South Korea-made FA-50 fighters and American-made F-35s