We could hire an interplanetary hulk. On a more serious note, cant we use nuclear explosions to guide them?However, the magnetic field issue is a serious one. Unless we find a way around it, all our terraforming, comet dropping, will be undone.

There is another alternative. The manned (or unmanned) mission should land near the poles, where theres plenty of CO2 and water ice. Split the water into hydrogen and oxygen, you get rocket fuel. I know this is easier said than done, especially creating the extremely cold temperatures required to store them, but its a start.

You cant establish a colony overnight. Building a sealed biosphere is hard enough. From where must all the consumables (food, water, fuel) come from? Terraforming is out of the question (atleast right now).

Sure, US took down their manned-reusable space vehicle, but before deciding what its replacement should be. Looks like they're going to have to depend upon the Russians (Soyuz).

No iPods - (slightly) lesser digital music penetration No iPhone - No app craziness, maybe no Android (I think Google bought Android just to compete with Apple). iTunes - Record labels largely sticking to physical media Of course, none of that multi-touch hype would have happened. MacOS - Windows would have been uglier, because MS tried to go the X way by beffing up Vista's eye candy.

This seems better - Ion Drive http://en.wikipedia.org/wiki/Ion_drive

You could run any OS you like - provided it isnt connected to the tubes.

Atleast, the present Iran. Its almost a dictatorship. No, not Ahmanenijad. The religious leader, Ayatollah Khomeini. Its like giving nukes to a mini Osama bin Laden. So far, US and Israel have been successful in making sure that he wont get his toys.