President Volodymyr Zelenskyy says Ukraine desperately needs tanks to fight Russia. The US, which has provided many other weapons, is refusing. This episode was produced by Victoria Chamberlin, edited and fact-checked by Matt Collette, engineered by Paul Robert Mounsey, and hosted by Noel King. Transcript at vox.com/todayexplained   Support Today, Explained by making a financial contribution to Vox! bit.ly/givepodcasts Learn more about your ad choices. Visit podcastchoices.com/adchoices