Ukrainian President Volodymyr Zelensky thanked President Biden Wednesday on the sidelines of the NATO summit for providing his country with cluster bombs, highly controversial munitions that are outlawed by more than 100 nations. Zelensky acknowledged it was a “difficult political decision” for Biden to move forward on providing the weapons, which make an explosive more dangerous by indiscriminately dispersing hundreds of projectiles over a larger area. “It’s very simple, you know, to criticize, for example, cluster munitions, and you made a difficult political decision,” Zelensky told Biden as the pair appeared together in Vilnius, Lithuania, amid the NATO summit.