Radiation detected at Chicago and Dallas airports as U.S. citizens are evacuated from Japan --UN predicts nuclear plume could hit U.S. by FRIDAY --Obama finally falls in line with the rest of the world and starts evacuating American citizens from Japan --French minister: 'Let's not beat about the bush, they've essentially lost control' --Cooling pool for spent fuel rods has 'boiled dry at reactor number four' --Japanese have 48 hours to avoid 'another Chernobyl' --Experts warn that crisis is 'approaching point of no return' as officials run out of options 17 Mar 2011 Radiation from Japan was detected in Chicago and Dallas today as U.S. citizens fleeing a potential nuclear disaster arrived back on American soil. Travellers landing at Chicago's O'Hare airport and Dallas Fort-Worth airport are said to have tested positive for minute amounts of radiation.