WASHINGTON – Immigration desk computers at various airports went down for about two hours on Monday, causing long lines for travelers entering the United States after year-end holidays, according to Customs and Border Protection and posts on social media. The processing system outage began at about 7:30 p.m. EST and was resolved about 9:30, the customs agency said in a statement. All airports were back on line after wait times for travelers that were longer than usual, it said. "At this time, there is no indication the service disruption was malicious in nature," the agency said. It gave no explanation for the disruption and said travelers were processed using alternative procedures.