Nov 20, 2015 The billionaire energy investor hasn't picked a favorite candidate yet.
Sep 2, 2015 The Obama administration says the US currency's dominance could be undermined.
Jul 14, 2015 Sanctions relief comes at an important moment for the Iranian population
Apr 6, 2015 Before it can grow, the country's post-sanction economy must modernize.
Mar 31, 2015 Iran wants sanctions to be lifted as soon as agreement is reached over its nuclear program but there are many complications.
Nov 24, 2014 Monday is the deadline for a deal in Iran’s nuclear talks.
Nov 10, 2014 Kai Ryssdal talks to Kim Zetter about her book.
Mar 29, 2013 A Maryland energy company wants to build the world's third-tallest structure to generate downdraft power in the Arizona desert.
Apr 19, 2013 Japanese officials say food produced in the region around the Fukushima Daiichi nuclear plant is safe. But if you want your rice tested in front of you -- there's a service for that.