PRI's The World: 02/01/2016

Let the caucusing begin. The 2016 race for the White House starts in earnest today in Iowa. Host Marco Werman, who has covered many a presidential race himself, admits he's still a bit fuzzy on the details of "caucusing." Marco turns to a foreigner who's had to get his head around it. Also, drug kingpin Joaquin "El Chapo" Guzman may be behind bars again, but his name is set to adorn a variety of products. Guzman's daughter has trademarked his name. Plus, we hear how some professional cyclists are now doping their bikes.