Since Russia’s full-scale invasion of Ukraine began over a year ago, officials in Kyiv have been asking their Western allies to supply the country’s air force with advanced warplanes such as the F-16. But the United States, which manufactures the fighter jet, was long reluctant to provide it, or to allow other countries that have F-16s to re-export them to Ukraine.
American officials worried that the jets could be used to hit targets inside Russia, potentially escalating the conflict, and…