1968 marked a politically and socially tumultuous time. In Europe the Soviets invaded Czechoslovakia. In the United States a nation mourned the loss of two great leaders to assassin's bullets: Civil Rights leader Martin Luther King and U.S. Senator and Presidential candidate Robert Kennedy. The counter-culture musical Hair made it's Broadway debut in 1968. Athletes were also anxious to keep up with the changing times. A proud new sign of the times was the sight of Mexican hurdler Enriqueta Basilio as the first woman to light the Olympic torch. The other gender-related news causing headlines at the Olympics was the introduction of gender for all competing athletes. Fans around the world were treated to a better view than ever. 1968 saw the introduction of color broadcasts and slow-motion. Both athletes and spectators could relax after a hard day's work with the luxurious innovations of the Jacuzzi and waterbed.