Secretary of State Marco Rubio oversees the U.S. Department of State. The State Department announced plans to investigate all 55 million people in the United States on temporary visas. File Photo by Ken Cedeno/UPI | License Photo Aug. 22 (UPI) -- The U.S. State Department plans to vet all 55 million foreigners in the United States on visas, looking for overstays, threats and "terrorist activity." "The State Department revokes visas any time there are indications of a potential ineligibility, which includes things like any indicators of overstays, criminal activity, threats to public safety, engaging in any form of terrorist activity,...