What type of support activities are included in Airfield Support Activities?

The correct choice indicates that Expeditionary Firefighting Rescue is indeed part of Airfield Support Activities. This type of support is critical because airfields, particularly in expeditionary environments (like forward operating bases or temporary airstrips in combat zones), require robust firefighting capabilities to respond to aircraft emergencies and accidents. The safety of personnel and equipment during flight operations heavily depends on having these specialized units ready and able to handle various emergencies, which often occur in proximity to aircraft operations.

The other choices, while important in their own contexts, do not fall under the umbrella of Airfield Support Activities. Logistical support and planning pertain more to overall mission planning and resource allocation rather than direct operational support at the airfield itself. Maintenance of air traffic control systems is vital but primarily deals with ensuring the functionality of navigation and communication equipment rather than direct firefighting or rescue operations associated with airfield security. Aircraft weapons system development, on the other hand, relates to the design and testing of weaponry for aircraft, which is outside the scope of immediate airfield operations and support activities.