Interviewer:
SECRETARY MCNAMARA
AND OTHERS IN THE HEARINGS MADE ARGUMENTS THAT TO BUILD AN ABM THAT WAS TRYING TO DEFEND
POPULATION CENTERS WAS PROVOCATIVE, TO THE EXTENT THAT THE ONLY RESPONSE TO IT WOULD BE TO BUILD
MORE OFFENSIVE MISSILES ON THE OTHER SIDE, THAT WOULD CANCEL OUT WHATEVER INCREMENT IN DEFENSE
WE HAD ACHIEVED. WHAT WAS YOUR RESPONSE TO THAT?
Foster:
Now the... arguments
were made, at that time, that it was likely that if one would put in defense of population, or
defense of, military forces that the most likely response, on the other side, would be to simply
provide more missiles, and penetrate that defense. Now, to some extent I think that's a good
argument. It, it has, it, it seems to work with simple arithmetic; that is to say, you add a
hundred defensive missiles, and then you add another hundred offensive missiles, and they cancel
one another out. Uh, that, however, does miss a point, and it's an important point: and that is…
for the, attacking force, a defense that it must penetrate is a lot more worrisome when you
really get down to the targeting problem, than it appears at first sight. That is to say, in the
US ABM proposal, a number of very talented and knowledgeable and able people argued that it
would be easy to penetrate that, and they would describe the scheme to the US Congress, for
example. Now that's true; in principle, it's possible to do just what they said, and it might be
that easy. But there's an interesting observation, and that is that at that time, we certainly
would not have used those tactics to penetrate the Soviet ballistic missile defense. So, from a
simple technical point of view, you might argue, "Well, it's easy to penetrate ballistic-missile
defense. All you have to do is add a few missiles," when you actually get down to planning to
conduct a very successful campaign against that, it turns out to be a lot different job, and a
lot more difficult. And so... when the US did its planning to penetrate the, the Soviet defense
around Moscow, it was very different from any of the proposals that were advanced by the
detractors of the US ABM proposal, as a mechanism to defeat it.