Welcome to Cold War 2, folks. Following increased diplomatic tensions over Russia's annexation of the Ukraine's Crimea, Russia is threatening to ban the US from using the International Space Station. Furthermore, and perhaps more significantly in the short term, Russia will ban the US from buying the Russian RD-180 rocket engines that are currently used by the ULA's Atlas V launcher to put the US military's satellites into space. These sanctions, issued by Russia's deputy prime minister Dmitry Rogozin, come in response to the US's own sanctions that restrict exports to Russia.