Ukrainian President Volodymyr Zelensky and Polish Prime Minister Donald Tusk signed a bilateral security agreement in Warsaw on Monday, a day before the start of a NATO summit in Washington. “Those who defend Ukraine today are also defending themselves,” said Tusk. Zelensky called the agreement “ambitious.” “It is capable of protecting the lives of our people and resisting Russian evil,” said Zelensky. The treaty provides for the development of a plan by which “Russian missiles and drones fired in the direction of Poland can be shot down in Ukrainian airspace.” Zelensky arrived in Poland as hi…