A close call occurred involving a United Airlines Boeing 737 and a Black Hawk military helicopter near John Wayne Airport in California. Reports indicate that the helicopter crossed in front of the United flight as it was approaching for landing, prompting concerns from air traffic control. The Federal Aviation Administration (FAA) has launched an investigation into the incident, which saw the two aircraft come alarmingly close, separated by only about 500 feet. This incident adds to a growing list of near misses, raising questions about airport safety protocols involving military helicopters in civilian airspace.