BY SEBASTIEN MALO (Reuters) – Stepped up efforts by the U.S. to halt the spread of the Ebola virus will start at New York’s John F. Kennedy International Airport on Saturday, where teams armed with thermal guns and questionnaires will screen travelers from West African countries hit hardest by the outbreak. JFK Airport is the first of five U.S. airports to start enhanced screening of U.S.-bound travelers from Guinea, Liberia and Sierra Leone, where most […]