At the onset of the Second World War, the United Kingdom primarily relied on silk sourced from Japan, China, and India for the production of parachutes. Silk’s strength, durability, and light weight made it the ideal material for parachutes, which were essential for delivering supplies to covert locations and ensuring the safety of airmen ejecting from damaged aircraft. However, the supply of silk became increasingly precarious as the war progressed, especially after Japan entered the conflict in December 1941, effectively cutting off access to the main silk-producing regions.

In response to the silk shortage, British efforts to secure alternative sources intensified. Peter Gaddum, Chief Assistant in the Ministry of Supply, undertook a series of covert and hazardous missions across several territories including the Congo River basin, the Nile region, and through parts of the Middle East such as Cyprus, Egypt, Turkey, India, and Lebanon. His work was crucial in locating and obtaining raw silk needed for military applications amid the global disruptions of the war.

The procurement challenges were ultimately mitigated by the advent of nylon, a synthetic polymer developed by the American company DuPont. Originally used in civilian products such as women's stockings, nylon production was redirected for military uses beginning in 1941. Compared to silk, nylon offered several advantages—it was more resistant to moisture, less prone to waterlogging, and better able to withstand humidity and low temperatures. Its greater tensile strength and elasticity allowed parachutes to stretch without tearing, resulting in safer and more comfortable landings. Nylon parachutes became a critical component of Allied operations in the later years of the war, including the Normandy invasion in 1944.

In a separate cultural note, the common celebratory gesture known as the high five was first documented during a baseball game on October 2, 1977, in Los Angeles. The moment involved Los Angeles Dodgers outfielder Dusty Baker, who had just hit his 30th home run of the season. As he crossed home plate, teammate Glenn Burke greeted him with an outstretched hand, prompting Baker to respond by slapping Burke’s palm. This spontaneous act marked the emergence of the high five.

The gesture evolved from the earlier practice of the “low five” or “giving skin,” a hand-slapping greeting and form of celebration prevalent in African-American communities from the 1920s onward. The high five quickly gained popularity and became a widely recognized symbol of congratulations and camaraderie.