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)

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)

(From 3rd L) US Senator Jacky Rosen, Deputy Minister of National Defense of Taiwan Hsu Szu-chien, US Senator Jeanne Shaheen, Taiwan's secretary-general of the National Security Council Joseph Wu, US Senator John Curtis, Deputy Secretary General of the National Security Council of Taiwan Vincent Chao and US Senator Thom Tillis pose for a group photo 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 Jeanne Shaheen (C) leads a delegation to 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)

US Senator Jeanne Shaheen (C) leads a delegation to 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)

A graphic showing a handshake between Taiwan and the US is seen 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)