NPR ventures into a Colombian emerald mine — which used to be more dangerous, with potential explosions inside and gunfights outside. The CEO, a former U.S. diplomat, says he wanted to change that.

NPR ventures into a Colombian emerald mine — which used to be more dangerous, with potential explosions inside and gunfights outside. The CEO, a former U.S. diplomat, says he wanted to change that.

NPR ventures into a Colombian emerald mine — which used to be more dangerous, with potential explosions inside and gunfights outside. The CEO, a former U.S. diplomat, says he wanted to change that.

NPR ventures into a Colombian emerald mine — which used to be more dangerous, with potential explosions inside and gunfights outside. The CEO, a former U.S. diplomat, says he wanted to change that.

NPR ventures into a Colombian emerald mine — which used to be more dangerous, with potential explosions inside and gunfights outside. The CEO, a former U.S. diplomat, says he wanted to change that.