NEW YORK (Reuters) - Brent crude fell below $20 (16.12 pounds) a barrel and U.S. crude plunged 27% on Monday, driven lower by skittish investors fleeing the U.S. benchmark due to lack of available storage to deal with a coronavirus-induced collapse in demand.Even as governments worldwide are taking tentative steps towards reducing restriction on movement to help economies rebound, fuel demand remains weak. Fuel demand is down 30% globally, and storage is becoming precious, with roughly 85% of..