This statement was quickly turned against him; if Excalibur could destroy a Soviet SDI system, then a Soviet Excalibur could do the same to theirs. Instead of ending the threat of nuclear weapons, Excalibur appeared to end the threat of SDI. More worryingly, when one considered such scenarios, it appeared the best use of such a system would be to launch a first strike; Soviet Excaliburs would destroy US defenses while their ICBMs attacked the US missile fleet in their missile silos, the remaining Soviet Excaliburs would then blunt the enfeebled response. Miller immediately sent a letter countering Wood's statements, but the damage was done.