AdvertisementDHS: Travelers From West Africa Limited To 5 U.S. AirportsOctober 21, 2014Scott NeumanfacebookEmailThomas Nellon (left), 17, and his brother Johnson Nellon, 14, of Liberia smile at their mother in the arrivals area at John F. Kennedy International Airport in New York earlier this month. The brothers received a health screening upon arrival. The U.S. says it will step up screening measures for arrivals from Ebola-affected West African countries. (AP)