All passengers flying from Sierre Leone, Liberia and Guinea into the U.S. will be required to enter the country through five major airports: Dulles International Airport in Washington, D.C.; John F. Kennedy International Airport in New York City; Newark Liberty International Airport; Chicago O’Hare International Airport; and Hartsfield-Jackson Atlanta International Airport.

“These airports account for about 94 percent of travelers flying to the United States from these countries,” Johnson said. “At present there are no direct, non-stop commercial flights from Liberia, Sierra Leone or Guinea to any airport in the United States.”

All five airports will now be required to specially screen passengers whose trips originated in any of those three countries and perform additional “added protocols, including having their temperature taken,” Homeland Security Secretary Jeh Johnson said in a release on Tuesday.