The U.S. Defense Department has revised its Law of War guidelines to remove wording that could permit U.S. military commanders to treat war correspondents as "unprivileged belligerents" if they think the journalists are sympathizing or cooperating with enemy forces.
Scientists have come up empty-handed in their latest effort to find elusive dark matter, the plentiful stuff that helps galaxies like ours form.
Virginia Senator Tim Kaine has emerged as the leading contender to join the Democratic ticket as Hillary Clinton's running mate, according to two Democrats, who both cautioned that Clinton has not made a final decision and could yet change directions.
Brazilian police have arrested 10 members of an "amateur" would-be terrorist group that expressed loyalty to the Islamic State organization and was preparing attacks ahead of the Olympics, officials said Thursday.
Gunmen burst into a musician's home in southern Mexico before dawn on Thursday, decapitated him and killed his wife and son, police said.
In an appeal to anxious voters, Donald Trump is pledging Thursday night that ``safety will be restored'' if he is elected president, using his Republican convention address to cast Democrat Hillary Clinton as part of a political class causing the nation's troubles.
Roger Ailes, who built Fox News into a politically powerful cable network, resigned Thursday under the cloud of a sexual harassment lawsuit.
Five years after Atlantis completed the space shuttle program's final voyage, NASA is still at least a year away from launching its astronauts from U.S. soil.
Donald Trump takes center stage to deliver the speech of his political life Thursday, trying to salvage a fractious Republican convention that saw a key rival showered in boos for withholding his endorsement.
Kathleen Carroll, the executive editor of The Associated Press who championed ambitious, investigative journalism and pushed the cooperative forward in a rapidly changing digital world, announced Wednesday that she will step down after 14 years leading the world's oldest news agency.