Maybe Russia and China have this technology already. After Gearld Bull’s death and the folding of SRC those scientists and engineers had to go somwhere.They also had affiliated companies that included SRCQ (SRC Quebec), SRCI, Paragon, PRB (Belgian corporation), and SRCB (SRC Belgium).
The other thing was the projectile had to be fired not up in the air at a steep angle but on much more of a flat trajectory, though slightly elevated, so that it would end up circling the earth like a satellite would. This flat trajectory only magnified the problems getting through the atmosphere and made the required blast a lot more bigger.
Good Point. You may be right,