Taiwan will not let external pressure prevent it from engaging with the world, President Tsai Ing-wen said on Wednesday as she headed for the United States after China threatened retaliation if she met US House Speaker Kevin McCarthy. China, which claims democratically-ruled Taiwan as its own territory, has repeatedly warned US officials not to meet Tsai, seeing it as showing support for the island's desire to be seen as a separate country. China staged major war games around Taiwan in August when then-US House Speaker Nancy Pelosi visited Taipei. Taiwan's armed forces say they are watching for any Chinese moves...