Officials stripped a New Jersey resident of his citizenship because they said he used a false name when he entered the United States more than 25 years ago. Baljinder Singh became the first person to be denaturalized under Operation Janus, a Homeland Security Department initiative that revokes citizenship of those who circumvented background checks during the naturalization process. A judge revoked his citizenship Friday, according to the U.S. Justice Department, which announced the ruling Tuesday. Assistant Attorney General Chad Readler said Singh “exploited” the U.S. immigration system, “which undermines both the nation’s security and our lawful immigration system.” Federal authorities...