ON FEBRUARY 24TH President Joe Biden announced a suite of sanctions against Russia in response to its invasion of Ukraine. The focus was on the country’s biggest banks, cutting them off from the dollar and limiting their ability to raise money abroad. But the announcement also contained a new kind of sanction, one that attempts to choke Russia’s supply of technological components. Mr Biden reckoned these measures would cut off “more than half of Russia’s high-tech imports”.
The American government has done something like this before to Huawei, a Chinese telecoms manufacturer, which it suspected of