U.S. President Donald Trump's visit to Poland on July 6 brought no major surprises, but it was enough for the government in Warsaw to feel relieved. Trump said the United States is "committed to maintaining peace and security in Central Europe" and that his administration is working with Warsaw "in response to Russia's actions and destabilizing behavior." Trump also said the White House supports Poland's strategy to diversify its energy sources. And while Trump's visit to Poland had a deep symbolic meaning, some concrete decisions were also taken, as the United States agreed to sell Patriot missile defense systems to Poland. These events happened only hours before Trump is scheduled to have his first meeting with Russian President Vladimir Putin on July 7 on the sidelines of the Group of 20 summit in Hamburg, Germany, an encounter that Poland (and the rest of the world) will be watching closely....