that could help stroke victims regain control of parts of their body. hello and welcome to our viewers on pbs in america and around the globe. president biden has arrived in poland after an extraordinary visit, to an active war zone on monday. joe biden s unannounced and surprise trip to kyiv was short on time, but long on symbolism, ahead of the first anniversary of the russian invasion of ukraine. he said america would stand with ukraine for as long as it takes and pledged another $500 million of military aid. speaking while air raid sirens were going off, president biden added that vladimir putin s war of conquest was failing. our international editorjeremy bowen has this report. (air-raid siren wails) the air raid alarm, as the two presidents arrived at st michael s church, where ukraine commemorates its war dead, felt too well timed to be a coincidence. with unprecedented security in kyiv, the americans had warned the kremlin that joe biden was coming. he had just arrive
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