This was reported by the Office of the President of Poland.
"Joe Biden's visit to Poland is a symbol of the most intense Polish-American relations in history and the unprecedented role that our country plays today in the international security system and support for the struggling Ukraine," the statement said.
The ministry emphasized that the second historic visit of the US president to Poland in less than a year has begun: "This is a clear signal of the United States' commitment to the security of our part of Europe."