Here are some of Mae Jemison's contributions to the United States:
* She was the first African-American woman to receive a doctorate in engineering from Stanford University. Her research focused on developing a system for detecting bone-marrow diseases based on computer imagery.
* She was selected as an astronaut candidate by NASA in 1987. She completed her training in 1990 and flew her first space shuttle mission in 1992.
* During her space shuttle mission, Jemison conducted experiments on bone cells and tissue growth in microgravity. She also participated in two spacewalks, becoming the first African-American woman to do so.
* After leaving NASA, Jemison founded the Jemison Group, a company that provides consulting services to government and industry clients. She also established the Dorothy Jemison Foundation for Excellence, which supports education and mentorship programs for women and minorities interested in STEM fields.
* Jemison has received numerous awards and honors for her work, including the Presidential Medal of Freedom, the highest civilian honor in the United States. She is also a member of the National Academy of Engineering and the National Women's Hall of Fame.
Mae Jemison is a pioneer in the fields of science, engineering, and space exploration. Her work has opened doors for women and minorities who are interested in pursuing careers in these fields. She is an inspiration to young people all over the world, and her contributions to the United States have been significant.