PBS NewsHour

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This undated handout photo provided by National Institute of Allergy and Infectious Diseases and GlaxoSmithKline (NIAID/GSK) shows a vaccine candidate, in a vial, that will be used in the upcoming human Ebola trials. Photo from GlaxoSmithKlineIt...
A drawing depicts artist Christo’s “Over the River” project. Photo by Wolfgang Volz, © 2007 Christo Imagine stringing nearly six miles of translucent silver panels above a 42-mile stretch of the Arkansas River in southern Colorado...
Immigrant rights activists shout slogans in front of the White House on August 28, 2014 in Washington, DC. Photo by Mandel Ngan/AFP/Getty ImagesWASHINGTON — With impeachment threats and potential lawsuits looming, President Barack Obama knows...
175,000 people participated in “Twitch Plays Pokémon,” a collaborative playthrough of the popular children’s game that crowdsourced directions from Twitch viewers.On Monday, Amazon announced that it had finalized a deal to acquire Twitch.tv, a live...
WASHINGTON — The Obama administration isn’t outlining any immediate punishment of Russia even as it decries President Vladimir Putin’s government for the apparent invasion of Ukraine. State Department spokeswoman Jen Psaki says Moscow is...
WASHINGTON — President Barack Obama will speak at 4 p.m. from the White House before convening a meeting with his national security team on the militant threat in Syria and Iraq. The U.S. is already launching airstrikes against Islamic State group...