A man found on the north side of Denver International Airport’s airfield Saturday afternoon was taken to a hospital and cited for trespassing, police said. Denver police identified him as 23-year-old Kibrom Tesfamichael. Airport officials said he was discovered at about 2:30 p.m. Radio traffic indicated he had climbed over a section of the airport’s northern perimeter fence. Police said airport operations staff had contacted him before officers arrived, and that he needed medical attention. The security breach follows a deadly runway incursion in May, when a man jumped an 8-foot fence and was struck by a plane during an attempted takeoff. His death was ruled a suicide. Passengers and some crew members from that flight have since filed a lawsuit alleging airport staff received an alarm but did not act after seeing deer and failing to spot the man. Joe LoRusso, an attorney representing plaintiffs and director of aviation at Ramos Law, said the May incident raised concerns that others might try to enter the airfield in a similar way. He argued that the perimeter still needs to be patrolled despite its size. Aviation expert Steve Cowell said DIA’s system includes cameras and other security technology, and that quick detection and response are key. The airport covers 53 square miles, making it the largest commercial airport in the United States by land area. Cowell said it is not feasible to station personnel or install barriers along every part of the perimeter. Saturday’s incident underscores the challenge of securing a vast airfield while also raising questions about how alerts are handled and how quickly staff can identify and respond to people who breach the perimeter.