The race to the moon galvanized a nation in turmoil. Can we do it again? Space travelers Charlie Duke, Michael Collins, Al Worden and Russell Schweickart talk about their historic missions.
President Donald Trump, flanked by Vice President Mike Pence (right) and Treasury Secretary Steven Mnuchin, signed an executive order in the Oval Office on June 24 that placed new economic sanctions on Iran. The measure is designed to deny top Iranian political and military leaders access to financial resources.