WARSAW, Sept. 1 (Xinhua) -- The Polish-U.S. relations are very good and becoming stronger, Polish Foreign Minister Radoslaw Sikorski and U.S. National Security Advisor General James Jones said after their Tuesday meeting in Sopot by Gdansk, north Poland.

    Jones, who headed a U.S. delegation to Tuesday's World War Two anniversary ceremonies in the Gdansk district Westerplatte, said that he was honored to attend the Westerplatte ceremony.

    During their meeting, Sikorski and Jones discussed bilateral relations, Afghanistan and anti-terrorist measures.

    Jones also gave Sikorski a letter from U.S. President Barack Obama, in which Obama called the Sept. 1, 1939 invasion of Poland by Germany which started off the European war "a black day in history."

    "The first day of September 1939 was a black day in history and the events it ignited brought years of tyranny and despair to Poland and other European countries," Obama said.

    "Today the U.S. and Poland are close allies working together to meet global challenges. They cooperate for common security and prosperity and support fundamental human rights in the entire world," the U.S. president added.