The US State Department has revoked the visas of more than 6,000 foreign students, expanding controls on the 55 million visa holders.

Nearly 55 million foreigners with US visas are now subject to heightened controls announced by the State Department. More than 6,000 foreign students have recently had their visas revoked, and officials emphasize that they can revoke visas whenever there is evidence of ineligibility, such as overstays, illegal activities or threats to public safety. The vetting process includes analyzing available information and immigration records.