Secretary Austin outlined U.S. production constraints and made the case to Congress for more funds to ramp up munitions production for Ukraine and Israel.
The visit is the latest in a small but expanding series of exchanges ahead of a possible meeting between Presidents Joe Biden and Xi Jinping next month.
President Biden intends to ask Congress for nearly $100 billion in military aid to Ukraine and Israel amid heightened tensions throughout the Middle East.
Zelenskyy visited Washington hoping to secure more and better US aid for Ukraine. But many of his pleas fell on deaf ears as Republican opposition grows.