FILE - In this image released by the U.S. Department of Defense, German soldiers assigned to Surface Air and Missile Defense Wing 1, fire the Patriot weapons system at the NATO Missile Firing Installation, in Chania, Greece, on Nov. 8, 2017. U.S. officials say the Pentagon is expected to announce that it will provide about $6 billion in long-term military aid to Ukraine. It will include much sought after munitions for Patriot air defense systems and other weapons. (Sebastian Apel/U.S. Department of Defense, via AP, File)