“An undercover investigation for National Geographic explores the availability of powerful synthetic drugs, with names like “spice” and “bath salts,” and its popularity among members of the U.S. military. For the next installment of National Geographic’s “Inside: Secret America” series, which takes an in-depth look at how people can easily purchase synthetic drugs, investigative journalist Mariana van Zeller went undercover with a former Marine and a Marine on active duty in San Diego to local smoke shops as they purchased bath salts.” Read more from National Geographic here.