NASA rolls out shuttle Atlantis for final time

The US space agency sent its last shuttle, Atlantis, out to the launch pad at Kennedy Space Center so it can prepare for the final launch of the American shuttle program in July.

US marks 50 years since second human spaceflight

Three weeks after the world marked 50 years since Russia's Yuri Gagarin became the first man to travel in space, the United States is honoring the American who followed him, Alan Shepard.

Funding threatens US return to moon by 2020

US ambitions of returning to the moon by 2020 and then heading to Mars risk being grounded because of "unrealistic" funds allocated to NASA, said Senator Bill Nelson, a former space shuttle astronaut.

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