Starting tonight at 11:59 PM EDT, George Bush Intercontinental Airport (IAH) in Houston, Texas, will begin receiving travelers who have been present in the Democratic Republic of Congo (DRC), Uganda, or South Sudan within the last 21 days, directing them toward enhanced federal health screening. The CDC expansion, announced Saturday by the Centers for Disease Control and Prevention, marks a significant escalation in the U.S. government’s response to an Ebola Bundibugyo virus outbreak that is rapidly expanding in Central Africa