Buckminster Fuller
designed (for the British War Relief Organization) a lightweight,
low cost, easily assembled “bombing shelter” [sic] to be used in
British cities. The shelter was a circular self-supporting structure
made from curved, corrugated, galvanised steel. It was never used
for this purpose as steel was in short supply due to the war. Some
units were supplied to, and used by the US Air Force, and the unit
was redesigned, at the end of the war, to provide post-war housing.

The artist’s impression of the Dymaxion Deployment unit is from;
The Dymaxion World of Buckminster Fuller by Robert W. Marks
published by Southern Illinois University Press in 1960.