Sec. of Defense McNamara canceled the YF-12 Blackbird program to fund the F-106X Mach 5 Interceptor. Then he canceled the F-106X program too. – The Aviation Geek Club
Even though the USAF ordered 93 YF-12 aircraft and had an initial budget of $90 million to further testing, this was withheld by Sec. of Defense McNamara who put it towards the F-106X program. LICK HERE to buy unique SR-71 Blackbird merchandise for your HABU collection. The YF-12 Blackbird was developed in the 1960s as a …