The Supreme Court upheld Trump's ban on trans-people in the military affecting many careers and people in training:
Sky News: Nic Talbott has dreamt of a career in the military for years. He enrolled in a training programme while at university and spent his weekends in camouflage crawling through mud, or strategising in mock battle scenarios. But a tweet by Donald Trump in July 2017 destroyed all of his plans. The president's tweet declared: "The United States Government will not accept or allow transgender individuals to serve in any capacity in the US Military."
Reason? Some fake BS about less money than Trump spends on presidential golfing support. Biden has promised to reverse this and make related discrimination illegal.