.Ukraine validates F-16s have shown up in nation as Zelensky proclaims 'brand new phase' in match versus Russia CNNUkraine gets 1st F-16 boxer planes to strengthen defenses against Russia, authorities tell AP The Associated PressExclusive|U.S. to Arm Ukraine's F-16 Planes With Advanced Weapons The Exchange JournalWar in Ukraine: Zelenskiy Reveals US-Made F-16 Fighter Planes in Trip Near Kyiv BloombergF-16 boxer jets get here in Ukraine that Zelenskyy claims will improve aggression versus Russia CBS Information.