Today's picture shows some girl rodeo riders. The picture was taken around 1910 at a rodeo near Los Angeles. I don't have any information on what type of event the ladies were in, but I might guess that it was some sort of trick riding or roping type show.
For those of you following our space launch, the launch has been delayed one day to Friday, May 9. The preflight operations will commence at 7:30 and launch itself at 8:15. You can watch live streaming coverage at this link the morning of launch: