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====2006β2009 Northrop Grumman Lunar Lander XCHALLENGE==== {{main|Lunar Lander Challenge}} The Northrop Grumman Lunar Lander XCHALLENGE (NGLLXPC) was a competition (co-hosted by NASA) to build precise, efficient small rocket systems. It was introduced in 2006 and the US$1 million top prize was awarded on November 5, 2009 to [[Masten Space Systems]], led by David Masten; while [[Armadillo Aerospace]], led by id Software founder [[John Carmack]] took home the second place prize of US$500,000, plus an additional $500,000 in 2008.
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