AP reports that the State Department’s electronic system for checking every visa applicant for terrorist or criminal history failed worldwide for several hours late Tuesday because of a computer virus, leaving the U.S. government briefly unable to issue visas. The virus crippled the department’s Consular Lookout and Support System, known as CLASS, which contains more than 12.8 million records from the FBI, the State Department and U.S. immigration, drug-enforcement and intelligence agencies. Among the names are those of at least 78,000 suspected terrorists. There was apparently no backup.