FILE - A Ukrainian officer with the 56th Separate Motorized Infantry Mariupol Brigade fires rockets from a pickup truck at Russian positions on the front line near Bakhmut in Ukraine?s Donetsk region on March 5, 2024. The outgunned and outnumbered Ukrainian troops are struggling to halt Russian advances as a new U.S. aid package is stuck in Congress. (AP Photo/Efrem Lukatsky, File)