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Following the first Ebola-related death in the U.S., White House Press Secretary Josh Earnest announced that five U.S. airports, including Dulles International Airport, would begin enhanced Ebola screenings of passengers soon.

Earlier today, a Liberian man who came to the U.S. with Ebola died in a Dallas hospital from the deadly virus. The Associated Press, via CBS DC, reports that before he landed in Dallas, he had a long layover in Dulles Airport.

The AP also reports that Dulles is one of five international airports that will soon begin “an additional layer of screening” to detect passengers who might be carrying the virus. The other four airports include New York’s JFK International, and airports in Newark, Chicago, and Atlanta. According to the AP, those three airports account for “94 percent of the people who travel to the U.S. from the three heavily hit countries in West Africa.”

While the enhanced screening—which includes taking passenger’s temperatures—is supposed to start at JFK Airport on Saturday, a timeline for when officials will being screening at Dulles hasn’t been officially been announced. A request for comment from the Metropolitan Washington Airports Authority has yet to be returned. We’ll update when we learn more.