Which aircraft originally developed for USAF has been used for medical evacuation as well as SAC joint missions? 
Strategic Airlift Capability: The Strategic Airlift Capability (SAC) is a consortium of 12 nations, 10 of which are member states of NATO and two of which are Partnership for Peace (PfP) members, to pool resources in order to operate Boeing C-17 Globemaster III aircraft for joint strategic airlift purposes. Boeing C-17 Globemaster III:  The C-17 commonly performs tactical and strategic airlift missions, transporting troops and cargo throughout the world; additional roles include medical evacuation and airdrop duties.
i don't know