From: "Phil Payne" 

> > http://www.defensetech.org/archives/002245.html

> Yup.

> & that's before mirv'es where a good chunk of the mirv payloads are fake
> inflatable decoys etc.

At that point they're in space.  There's next to no atmosphere, and they
don't need to be aerodynamic.  Or very big, either - a decoy could be the
size of a golf ball with lots of included right angles.  Any given vehicle
could take a few warheads and literally dozens if not hundreds of decoys
aloft.

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