Which aircraft is NOT used for expeditionary medical support?

The F-16 is primarily designed as a multi-role fighter aircraft, focusing on air-to-air and air-to-ground combat capabilities. Its primary mission is to perform as an offensive and defensive fighter, which does not include the support of medical operations or the transport of medical supplies and personnel in an expeditionary context.

In contrast, aircraft like the C-130, C-17, and KC-135 play roles that align more closely with expeditionary medical support. The C-130 is often utilized for tactical airlift missions, which can include transporting medical personnel and supplies to forward operating locations. The C-17 serves as a strategic airlift capability that can quickly move large quantities of medical equipment and personnel across long distances. The KC-135, while primarily a tanker aircraft for refueling, can also support airlift missions, including the transport of medical cargo in particular scenarios.

Thus, the F-16 does not fit into the category of aircraft used for expeditionary medical support due to its specific combat mission, making it the correct answer.