Re: but the target made it easier by sending back tracking data.
>So really, all we need is for everyone to install transponders on their ICBMs.
It is just the considerate thing to do.<
Yep. Except that the missile they failed to intercept wasn't an ICBM - it was a much slower, lower-altitude aircraft-launched missile. An ICBM travels outside the atmosphere, at far higher speeds, and typically delivers several different warheads to different locations. It would be orders of magnitude harder to destroy one of those.