What type of personnel are primarily responsible for a significant portion of the Department of the Air Force's airlift?

The Air Reserve Component (ARC) plays a crucial role in the Department of the Air Force's airlift capabilities. This includes both the Air Force Reserve and the Air National Guard, which together provide essential support for airlift operations. The ARC is specifically structured to augment the active-duty forces, meaning that during periods of high demand or operational need, these reservists can be activated to support missions that require extensive airlift resources.

Additionally, the personnel in the ARC usually have specialized training and experience that make them well-equipped to handle the logistical demands of airlifting personnel and supplies. Their dual-status as both civilians and service members allows for a flexible response to airlift requirements, especially during emergencies or large-scale operations.

While other components like Regular Component Forces and National Guardsmen also contribute to airlift, the Air Reserve Component is uniquely positioned in terms of its trained personnel specifically dedicated to airlift and transport roles, thereby being a primary contributor in this area. Civilian contractors may support airlift operations, but they are not typically responsible for the strategic and operational tasks that the ARC personnel manage.