In developed countries women still face unacceptable career barriers.

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In his 37-year career, General Austin has continually broken barriers for African-Americans in the U.S. Army.

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Through her own experiences as a scientist with a disability -- and through her research, leadership, and mentoring efforts -- she is helping our nation identify and enhance facilitators and address barriers to STEM education and career success for people with disabilities.

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The 83-year-old Walters has broken many barriers for women over her nearly 50-year-career in television.

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Creating further barriers to enter teaching might make sense in order to make teaching a more desirable career in the long-term, but it could easily create even more artificial scarcity in the near term, risking an even wider teacher shortage.

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