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Thousands of goggle-wearing high school students have descended on the Edward Jones Dome this week for a competition that often leads to careers in engineering and technology — fields that have long been dominated by men.Increasingly, the competitors are girls.As the U.S. FIRST Competition marks its fourth year in St. Louis, the presence of girls on the world’s best robotics teams has noticeably gone up, offering hope to corporations wanting to recruit from a more diverse pool of programmers and engineers.