WASHINGTON (Reuters) -U.S. President Joe Biden visits South Korea and Japan from May 20-24, a trip seen as crucial for efforts to bolster regional cooperation and counter China. Here is the latest on Biden’s schedule: SOUTH KOREA: Friday, May 20 – Sunday May, 22 * Biden departed Washington on Thursday afternoon. * Arrived the U.S. Osan Air Base in Pyeongtaek, South Korea, on Friday evening, and toured a Samsung Electronics semiconductor plant with South Korea’s President Yoon Suk-yeol, underscoring supply chain security. * Saturday afternoon, Biden will participate in a wreath laying ceremony …