Passengers hold handles in a train of the Line 1 of the HCMC Metro in Ho Chi Minh City on December 22, 2024. Thousands of selfie-taking Ho Chi Minh City residents crammed into train carriages on December 22, as the traffic-clogged business hub celebrated the opening of its first-ever metro line after years of delays. (Photo by Nhac NGUYEN / AFP) (Photo by NHAC NGUYEN/AFP via Getty Images)