Why can't we take a standard airplane to Mars?

That way we wouldn't have to go through the expense and trouble of building some fancy dancy spaceship, when we already got thousands of these things laying around airports.. Planes have comfortable seating, oxygen masks, stewardesses, food, etc. everything we need and then some. We could just gas er up and... show more That way we wouldn't have to go through the expense and trouble of building some fancy dancy spaceship, when we already got thousands of these things laying around airports..
Planes have comfortable seating, oxygen masks, stewardesses, food, etc. everything we need and then some.
We could just gas er up and go. No more needless delays.
Update: How about answering my question this time, instead of reporting it!
Update 2: Question reinstated. Thank you Yahoo!
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