The teams devoted the better part of a year and spent US$10,000 to US$3.5 million to produce their entries. For most contestants, the prize money was a small part of the incentive.
"I don't think the money is the motivation," said Anthony Tether, DARPA's director. "It has sparked an interest in science and technology in this country that we haven't seen since the 1960s with the Apollo program."
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