Asteroid use

Marcel Williams wrote:

> MW: Sending people to mine the largest asteroids makes
> good economic sense. But sending robots out to
> capture small asteroids and bringing them back to be
> processed in Mars orbit also makes good economic sense
> and would be cheaper than sending people out to the
> asteroids.

What do you want to go to the asteroid belt for
when you have Deimos and Phobos?

Phobos and Deimos are C-type asteroids that are
already in mars orbit. Carbon. As in carbon fiber.
As in diamond. Ice as in water. As in hydrogen,
oxygen. As in steam. What more do you want? Fuel
is very useful.

And they have minerals.