President Volodymyr Zelensky sent an urgent letter to US President Donald Trump warning that Ukraine is facing a worsening shortage of air defense systems, particularly anti-ballistic missile capabilities, according to a report on Wednesday, May 27. According to the Kyiv Independent, the letter warns that Ukraine’s current stockpile of Patriot interceptors and other Western-provided air defense systems may not be sufficient to withstand escalating Russian missile attacks.JOIN US ON TELEGRAMFollow our coverage of the war on the @Kyivpost_official. “When it comes to defending against ballistic missiles, we rely almost exclusively on the United States.” The appeal comes as Russia intensifies large-scale aerial bombardments across Ukraine and publicly threatens new long-range strikes against Kyiv, including attacks on what Moscow described as Ukraine’s “decision-making centers.” According to the Kyiv Independent, Ukraine’s Ambassador to the United States Olha Stefanishyna has been distributing the letter to the White House, House Speaker Mike Johnson and members of Congress. The letter also reportedly expresses concern over delays in weapons deliveries through the Prioritized Ukraine Requirements List (PURL) program, which allows NATO allies to finance purchases of US-made weapons for Ukraine. “The current pace of deliveries through the PURL program is no longer keeping up with the reality of the threat we face,” the letter says.