Hawker Hunter Aviation (HHA) operates a fleet of retired Hawker Hunters. HHA provides the jets to RAF and other NATO partners for purposes like air combat training, Joint Tactical Air Controller (JTAC) training and trials. These contracted Hunters are often upgraded with modern avionics.

Alarms sounded in the cockpit of a Southwest Airlines jet shortly after taking off from Hollywood Burbank airport near Los Angeles on Friday, prompting evasive maneuvers, the airline said in a statement.