> the Russians spiked the price at the last minute

What's the source for this part?

    They had two more trips scheduled to Russia; now Ressi 
    decided, as he says, "I didn't like dealing with Russians," 
    and told Musk he wasn't going back. Musk went anyway. On 
    the second trip, Musk brought his wife, Justine — "I think 
    that's the trip when the lead Russian designer started 
    spitting at us," Cantrell says — and on the third and final 
    trip he brought his money. He was ready to buy three Russian 
    ICBMs for $21 million when the Russians told him that no, 
    they meant $21 million for one. "They taunted him," Cantrell 
    says. "They said, 'Oh, little boy, you don't have the money?' 
    I said, 'Well, that's that.' I was sitting behind him on the 
    flight back to London when he looked at me over the seat and 
    said, 'I think we can build a rocket ourselves.'"

It's a great article.