NEWARK, N.J.—A security officer leapt over conveyor belt rollers and saved a 2-month-old boy who stopped breathing at a security checkpoint at Newark Liberty International Airport in New Jersey, newly released video shows. The footage, released Thursday by the U.S. Transportation Security Administration, shows TSA officer Cecilia Morales springing into action to resuscitate the child Dec. 9 after his mother picked him up from a car carrier and noticed he wasn’t breathing. Morales, an EMT who has been a TSA officer for about two months, told the agency she performed the infant version of the Heimlich maneuver, placing the baby face down on her arm and patting him on the back to get him breathing again. It was the first time she had performed the technique on an infant, she said. A pediatric EMT arrived a short time later to give the baby oxygen. A TSA spokesperson said the agency …