June 2, 1942: This portable solid timber bomb shelter is large enough for three people and takes onl

June 2, 1942: This portable solid timber bomb shelter is large enough for three people and takes only 10 minutes to erect. No metal, not even nails, was used in its construction. The invention of C. Boissevain of New York, the shelter was on exhibition at the 1942 inventors’ exposition sponsored by the American Hobby Federation in New York.

Photo: AP via the Denver Post