On July 5, 1946, French designer Louis Réard unveils a daring two-piece swimsuit at the Piscine Molitor, a popular swimming pool in Paris. Parisian showgirl Micheline Bernardini modeled the new fashion, which Réard dubbed “bikini,” inspired by a news-making U.S. atomic test that took place off the Bikini Atoll in the Pacific Ocean earlier that week. European women first began wearing two-piece bathing suits that consisted of a halter top and shorts in the 1930s, but only a sliver of the midriff was revealed and the navel was vigilantly covered. In the United States, the modest two-piece made its appearance...