Military plane made by U.S.-firm Lockheed Martin at the Vietnam International Defense Expo held in Hanoi, Vietnam, Thursday, Dec.19, 2024. (AP Photo/Aniruddha Ghosal)

Two men in Vietnamese military uniform talk to each other next to a stall by Vietnamese state-owned firm Viettel at the Vietnam International Defense Expo held in Hanoi, Vietnam, Thursday, Dec.19, 2024. (AP Photo/Aniruddha Ghosal)

Iran's Defense ministry pavilion at the Vietnam International Defense Expo held in Hanoi, Vietnam, Thursday, Dec.19, 2024. (AP Photo/Aniruddha Ghosal)

A man takes a photograph of China's NORINCO stall at the Vietnam International Defense Expo held in Hanoi, Vietnam, Thursday, Dec.19, 2024. (AP Photo/Aniruddha Ghosal)

A woman walks past stalls set up by Russian firms at the Vietnam International Defense Expo held in Hanoi, Vietnam, Thursday, Dec.19, 2024. (AP Photo/Aniruddha Ghosal)