N15YC / 72-1875 (cn CX001) Airplanes - Civilian - Static Display - Large jets Links: virtualglobetrotting.com By: Rene73
http://virtualglobetrotting.com/map/mcdonnell-douglas-yc-15/
I think this is the other prototype is here:
http://tinyurl.com/yex7dtz
72-1875 (cn CX001): AMARC (Davis-Monthan AFB) -> Pima Air & Space Museum -> Air Force Plant 42 (Palmdale) -> Air Force Flight Test Center Museum's "Century Circle" (Edwards AFB)
http://www.airliners.net/search/photo.search?regsearch=N15YC
72-1876 (cn CX002) : AMARC
http://www.airliners.net/search/photo.search?regsearch=72-1876&distinct_entry=true