Correct. I think (behind the legend) was a bit of a Lockheed campaign to continue building SRs for the strike role. The basic structure (of the SR) has the same chine bays as the YF-12, which had been cleared for weapon launch. Ben Rich wanted to stick SRAMs in there.
So the idea hung around that it should have been reconnaissance-strike (as the AF had tried to rename the B-70 the RS-70) but that the administration (blame McNamara, of course) sabotaged it.
However, the SR never (as far as I know) had the kind of sensor or fire-control system that would be needed to launch weapons.