.Ukraine validates F-16s have shown up in nation as Zelensky heralds 'new section' in fight against Russia CNNUkraine receives first F-16 fighter planes to strengthen defenses against Russia, representatives tell AP The Associated PressExclusive|U.S. to Upper arm Ukraine's F-16 Planes Along with Advanced Weapons The Wall Street JournalWar in Ukraine: Zelenskiy Presents US-Made F-16 Competitor Planes in Air Travel Near Kyiv BloombergF-16 fighter jets show up in Ukraine that Zelenskyy points out will boost aggression versus Russia CBS News.