Polish President Andrzej Duda has become the first foreign head of state to address the Ukrainian parliament since the Russian invasion began. No one can disturb Polish-Ukrainian unity, Duda said in his speech, which Ukrainian MP Olexij Honcharenko published live on Facebook on Sunday. Again and again, the parliamentarians rose to applaud the guest from Poland. Ukrainian President Volodymyr Zelensky was also present. Duda’s surprise solidarity visit was announced on Sunday morning. The 50-year-old was travelling to Ukraine for the second time since the outbreak of war at the end of February. A…