Logistics of returning stranded passengers

From the BBC World Service: One of Europe's busiest airports has canceled more than 700 flights today as a disruption caused by snow and ice enters a sixth day. The problem was made worse because of a shortage of anti-freeze for de-icing planes at Schiphol Airport in Amsterdam. Dutch airline KLM is the main one affected. Then, China's Foreign Ministry calls President Donald Trump's demands for Venezuelan oil "typical bullying" from the U.S.