Ukrainian troops withdrew from the devastated eastern town of Avdiivka‚ Ukraine's new army chief said in the early hours of Saturday‚ paving the way for Russia's biggest advance since May 2023 when it captured the city of Bakhmut. The withdrawal‚ announced as Ukraine faces acute shortages of ammunition with U.S. military aid delayed for months in Congress‚ aimed to save troops from being fully surrounded by Russian forces after months of fierce fighting‚ Kyiv said. General Oleksandr...