An F-16 Fighting Falcon.US Air Force photo by Senior Airman Zachary WillisUkraine is set to receive its first F-16 fighter jets from its Western partners this summer.But the exact number of planes is unclear, and Zelenskyy said it likely won't be enough.He compared the problem to Ukraine's Abrams tanks, which it only got 31 of and hasn't used much.Western-provided F-16 fighter jets are on their way to Ukraine and set to start flying missions later this summer.But they may not yet be enough to make a difference on the battlefield, Ukrainian President Volodymyr Zelenskyy indicated in a discussion this week on what Ukraine needs, comparing the jets to the US-made Abrams tanks that Ukraine got last fall.Asked by Fox News' host Bret Baier at the Reagan Institute if the 31 Abrams Ukraine received as its counteroffensive was already stumbling made a difference, Zelenskyy said: "I'm not sure that such number of tanks can change the situation on the battlefield."Speaking in Washington, DC, Wednesday as the NATO summit was underway, he said "it's like the dialogue about F-16." Usefulness comes down, in some ways, to numbers and timing."We always wait, like my mother waited me after school," Zelenskyy said.