Ukraine's air force pilots have started flying F-16s for operations within the nation, President Volodymyr Zelensky said on Sunday, confirming the long-awaited arrival of the U.S.-made fighter jets more than 29 months since Russia's invasion. The Ukrainian leader announced the supply of the warplanes, which Kyiv has lobbied for since the first year of the war, as he met air force pilots at an airbase flanked by two F-16s with two more of them flying overhead. "F-16s are in Ukraine. We did it. I am proud of our guys who are mastering these jets and have already started using them for our country," he said.