PBS NewsHour

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The World Health Organization ran clinical trials for an Ebola virus vaccine in Guinea. The storage devices shown here use jet fuel to keep the vaccines at a temperature of minus 60 degrees Celsius. Photo by S. Hawkey/WHO A vaccine for the Ebola...
A sunflower field and a tree at sunset. Photo Janet Kopper / Getty Images It’s a T-shirt kind of day in Washington, DC: 85 degrees with 63 percent humidity. We all know those numbers mean hot, but what exactly does that humidity percentage...
William F. Buckley and Gore Vidal frequently traded barbs during ABC News’ 1968 political convention coverage. Their on-air friction laid the groundwork for modern political punditry. Photo by ABC Photo Archives/ABC via Getty Images Contenders...
A Palestinian protester throws a tear gas canister, initially fired by Israeli troops, during clashes in the West Bank city of Hebron July 31, 2015. Suspected Jewish attackers torched a Palestinian home in the occupied West Bank on Friday, killing...
President Barack Obama delivers remarks at the African Union in Addis Ababa, Ethiopia July 28, 2015. Photo by Jonathan Ernst/Reuters President Obama was deep into a hefty policy speech to the 54 nations of the African Union about the future of the...
Odds are, you have been to a hospital at some point in your life. Did you know, though, that many hospitals do more than just care for very ill patients? We looked at some examples in the Washington area, offered in this report from Kaiser Health...