Billionaire Elon Musk has countered president Donald Trump's threat to "terminate Elon’s Governmental Subsidies and Contracts," threatening to permanently cut the United States off from space. "In light of the President’s statement about cancellation of my government contracts, SpaceX will begin decommissioning its Dragon spacecraft immediately," Musk tweeted. If Musk were to make good on his threat, the United States' space program could experience an enormous setback of epic proportions. SpaceX's Dragon spacecraft has quickly become the de facto method of NASA astronauts traveling to the International Space Station. In other words, American astronauts could soon be prevented from visiting […]