What's been happening in China's Xinjiang, home to 11 million Uyghurs?

As US President Donald Trump signed a bill into law Wednesday that aims to punish Beijing for its repression of the Uyghur ethnic minority, he was accused by his former national security adviser of endorsing China's construction of internment camps in its western region of Xinjiang.

source https://www.cnn.com/2020/06/19/asia/xinjiang-explainer-intl-hnk-scli/index.html