Hani Goodarzi is trying to cure cancer. At the new lab he runs at the University of California, San Francisco, he and his team try to understand the disease’s molecular processes, building on his research into disease metastasis. Important, life-saving work. He has grants to write, and bench work to oversee, but right now all he can think about is the pain President Donald Trump’s travel ban will cause students and postdocs from Iran, where he was born.

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