The Japanese and U.S. defense chiefs on Wednesday agreed their nations will undertake joint technological research to counter hypersonic weapons, as they work to closely align their national security strategies amid China's growing assertiveness in the region.The talks between Japanese Defense Minister Yasukazu Hamada and his U.S. counterpart Lloyd Austin at the Pentagon -- their first in-person meeting since Hamada's appointment last month -- came amid heightened tensions over Taiwan following U.S. House of Representatives Speaker Nancy Pelosi's recent trip to the self-ruled island."China'…READ FULL ARTICLE