Jan. 9 (UPI) -- U.S. Defense Secretary Lloyd Austin answered a plea Thursday from Ukrainian President Volodymyr Zelensky for more help to keep Russian warplanes away from its cities and borders by announcing a $500 million package to boost its air defenses. The funds from a $4.3 billion presidential drawdown authority were for more air defense missiles, ammunition, air-to-ground munitions and additional equipment to support Ukraine 's fleet of F-16 fighter jets, Austin told a meeting of the