Vice Mister of Taiwan National Defense Ministry Hsu Szu-chien delivers a speech to welcome US Sen. Jeanne Shaheen, from left, John Curtis, Thom Tillis, Jacky Rosen and AIT (American Institute in Taiwan) Director Raymond Greene as they visiting the National Chung-Shan Institute of Science and Technology (NCSIST) in Taoyuan City, Northern Taiwan, Monday, March 30, 2026. (AP Photo/Chiang Ying-ying)

From left, US Sen. Jacky Rosen, Vice Mister of Taiwan National Defense Ministry Hsu Szu-chien, US Sen. Jeanne Shaheen, Secretary-General of the Taiwan National Security Council Joseph Wu, Sen. John Curtis, and US Sen. Thom Tillis, first from right, smile as they visiting the National Chung-Shan Institute of Science and Technology (NCSIST) in Taoyuan City, Northern Taiwan, Monday, March 30, 2026. (AP Photo/Chiang Ying-ying)

(L-R) US Senators Jeanne Shaheen, John Curtis, Thom Tillis, Jacky Rosen and AIT director Raymond Greene visit the National Chung-Shan Institute of Science and Technology (NCSIST) in Taoyuan on March 30, 2026. (Photo by I-Hwa Cheng / AFP via Getty Images)

The autonomous underwater vehicle (AUV) Dive-LD is displayed at the lobby of the National Chung-Shan Institute of Science and Technology (NCSIST) in Taoyuan on March 30, 2026. (Photo by I-Hwa Cheng / AFP via Getty Images)

US and Taiwan flags fly outside the National Chung-Shan Institute of Science and Technology (NCSIST) in Taoyuan on March 30, 2026. (Photo by I-Hwa Cheng / AFP via Getty Images)

Taiwan's Secretary-general of the National Security Council Joseph Wu (L) and US senators Thom Tillis (2nd L) and Jeanne Shaheen (3rd L) arrive at the National Chung-Shan Institute of Science and Technology (NCSIST) in Taoyuan on March 30, 2026. (Photo by I-Hwa Cheng / AFP via Getty Images)

US Senator Jacky Rosen arrives at the National Chung-Shan Institute of Science and Technology (NCSIST) in Taoyuan on March 30, 2026. (Photo by I-Hwa Cheng / AFP via Getty Images)

A visitor looks at a display of the Tien Kung III missile system at the National Chung-Shan Institute of Science and Technology (NCSIST) in Taoyuan on March 30, 2026. (Photo by I-Hwa Cheng / AFP via Getty Images)