section_path: Presidency/Foreign relations
section_name: Foreign relations
paragraph_text: Foreign relations
  
  Zelenskyy's first official trip abroad as president was to Brussels in June 2019, where he met with EU and NATO officials.
  
  In August 2019, Zelenskyy promised to lift the moratorium on exhuming Polish mass graves in Ukraine after the previous Ukrainian government banned the Polish side from carrying out any exhumations of Polish victims of the Ukrainian Insurgent Army -perpetrated Volhynian massacres, following the removal of a memorial to the Ukrainian Insurgent Army in Hruszowice, southeastern Poland.
  
  In September 2019, it was reported that U.S. president Trump had allegedly blocked payment of a congressionally mandated $400-million military aid package to Ukraine to pressure Zelenskyy during a July phone call between the two presidents to investigate alleged wrongdoing by Joe Biden and his son Hunter Biden, who took a board seat on Ukrainian natural gas company Burisma Holdings. This report was the catalyst for the Trump–Ukraine scandal and the impeachment inquiry against Donald Trump. Zelenskyy has denied that he was pressured by Trump and declared that "he does not want to interfere in a foreign election."
  
  On a trip to the United States in September 2021, Zelenskyy engaged in talks and commitments with U.S. president Joe Biden, Secretary of Defense Lloyd Austin, Secretary of Energy Jennifer Granholm, and Secretary of State Antony Blinken. President Zelenskyy and First Lady Olena Zelenska also took part in the opening of the Ukrainian House in Washington, D.C. On the same trip, he met with Apple CEO Tim Cook and with Ukrainians in senior positions at Silicon Valley tech companies, and spoke at Stanford University. While Zelenskyy was still in the U.S., just after delivering a speech at the United Nations, an assassination attempt was made in Ukraine on Shefir, his closest aide. Shefir was unhurt in the attack, although his driver was hospitalized with three bullet wounds.