L-R: University of Nevada, Las Vegas President Robert Maxson and Las Vegas civic leader Blanceh Zucker at a University Library Society reception, Las Vegas, Nevada.
Women in bathing suits sit on a parade float with the words "Nevada's First Atomic Bomb" written on the side and a fake mushroom cloud behind them. The first atomic detonation at the Nevada test site was January 27, 1951. This is possibly the Helldorado Days festival parade.