A number of prominent neocons calling themselves “GOP national security leaders”—including Michael Chertoff, Max Boot, Eric Edelman and Robert Kagan—have penned an open letter stating their opposition to the candidacy of Donald Trump. “We the undersigned, members of the Republican national security community, represent a broad spectrum of opinion on America’s role in the world and what... 

An asteroid believed to be carrying up to 90 million tons of platinum in its core, as well as other rare and precious materials, is about to swoosh past our planet. The news has left developers of asteroid-mining technologies intrigued. The platinum-rich asteroid officially named 2011 UW158, is 452 meters by 1,011 meters in size and will pass Earth at a distance of an estimated 2.4 million kilometers,...