Ukraine could develop a rudimentary nuclear bomb within months if Donald Trump withdraws US military assistance, according to a briefing paper prepared for the Ukrainian Ministry of Defence. The country would quickly be able to build a basic device from plutonium with a similar technology to the “Fat Man” bomb dropped on Nagasaki in 1945, the report states. “Creating a simple atomic bomb, as the United States did within the framework of the Manhattan Project, would not be a difficult task 80 years later,” the document reads. With no time to build and run the large facilities required to enrich...