Ukraine has run out of missiles for the US-made Patriot air defense system, leaving it more vulnerable to Russian ballistic missile attacks, a source familiar with the situation told CNN on Thursday. The stark development comes amid an increasingly bitter public feud between US President Donald Trump and his Ukrainian counterpart Volodymyr Zelensky. In recent days, the White House struck a highly criticized deal to import Russian diesel and heaped increasing pressure on Ukraine to halt its strikes on Russia’s oil infrastructure. Zelensky said he felt betrayed by Trump’s deal with Russian President Vladimir Putin and has since announced Ukraine...