Children look up from inside a bomb bunker outside Hanoi's Metropole hotel in 1968. Bomb bunkers were set up at many locations across the capital city during the 1965 - 1972 period. These bunkers were built on both pavements of major streets to help residents reach one as quickly as possible.
130 photos of Hanoi from 1967 to 1975, taken by Billhardt, are showcased at an exhibition at Manzi Art Space in the capital city, from October 3 to November 15, 2020.