http://www.mcclatchydc.com/news/politics-government/national-politics/article84983262.html
Marine Corps leaders initially balked at allowing women into certain infantry, reconnaissance and combat engineer jobs, pointing to studies that showed mixed gender units did not perform as well as male-only units. But Defense Secretary Ash Carter ordered all combat jobs must be open to women.
The Marines developed a detailed progression of physical standards that recruits must meet to get into the combat jobs. And officials insist that standards will not be lowered to allow more women to pass.
The results underscore the difficulties for women. Nearly 86 percent of the women failed the tests, compared to less than 3 percent of the men.