
In a parallel world where JFK survived the assassination attempt in Dallas, as the Apollo programme reaches its triumphant goal the former President encourages NASA to build on this success and send men to Mars.
Project Rover: http://en.wikipedia.org/wiki/Project_Rover
For hard scifi buffs, check out Stephen Baxter's space-program-alt-hist novel Voyage, where (among other things) NERVA is revived for a manned Mars shot.
I'm kinda surprised to see this; I thought that public acceptance of nuclear-related programs would be at a low, after Fukushima. Heck, I remember when people were kicking up a fuss over Cassini's RTG back in 1997.
Are we going to revive Project Orion next? http://en.wikipedia.org/wiki/Project_Orion_%28nuclear_propul...
Not much about the actual exploration of Mars, but a good imagining of the technology and politics needed to get there.
Because of this two books are interwoven in my brain, it’s a weird mashup.
I remember reading Stephen Baxter's "Voyage" in the 90s, in which Kennedy escapes his assasination, the Apollo program ends rather differently and NASA subsequently stretches/evolves the hardware to put a crewed mission on Mars, rather than building the Shuttle. It's been a long time, but I think I recall enjoying the geeking out on the equipment and little historical details.
(I've since read the novel has been widely criticized as plagiarizing the Cox/Murray book on Apollo history, which I read 20 years later and is an amazing achievement.)