The Taiwan Navy's Hai Kun submarine unveiled during an event at CSBC Corp.'s dockyard in Kaohsiung, Taiwan, on Thursday, Sept. 28, 2023. Taiwan unveiled a prototype of its first submarine assembled at home as it prepares to stave off a potential invasion by China, a feat only made possible with the secretive help of other countries. Photographer: I-Hwa Cheng/Bloomberg via Getty Images