While planning a road trip accross the South-West on Google Maps, I stumbled on Davis Monthan AFB in Tucson, AZ. Looking at the scores of retired warbirds laying in the desert, I found something really unusual in the triangle between Yuma Street, Picacito Street and South Wilmot Road (I hope the link will work).
davis monthan afb - Google Maps
Could it possibly be two D-21s that were launched from the M-21 (one exotic member of the Blackbird family) ?
Thanks.