More than 500 student visas revoked as the government expands reasons for deportation
By Andy Rose and Caroll Alvarado, CNN (CNN) — Kseniia Petrova’s path from a Harvard laboratory to an immigration cell began with frogs. The Russian national who has been working as a researcher at Harvard Medical School failed to declare “non-hazardous” frog embryos she was carrying with her on her return to the US from
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