After selling PayPal, Musk wondered why NASA had no concrete plan to send humans to Mars. In 2001 he conceived "Mars Oasis," a mission to land a small robotic greenhouse on Mars that would grow plants and, he hoped, reignite public enthusiasm for exploration.[1][2]
He needed a cheap rocket. In late 2001 and early 2002 he traveled to Moscow with a small group, including aerospace engineer Jim Cantrell and future SpaceX investor Adeo Ressi, to try to buy refurbished intercontinental ballistic missiles. The talks went badly, and the prices quoted were far beyond what he wanted to pay.[1][2]




