you're going to die from something. >> laura ling joins me now. good to see you.> hi, chris, how are you. >> they continue to make headlines, these designer drugs, but i'm not sure a lot of people understand what they are or how prevalent they are. fill us in. >> well, these are chemicals that a lot of them you may have heard their names, molly, bath salts or synthetic marijuana also known as spice. but there are hundreds, perhaps thousands of these chemicals. some just known as numbers and letters. 2 cb, 2 cp, 25 i, and they are very popular. we spoke with students at a college campus who said that they can get these research chemicals easier than they can get alcohol. >> and what are some of the challenges then in regulating them, controlling them, especially when it comes to use by high school kids, college kids? >> well, it's a huge challenge because while there are laws against certain chemicals, the tricky part is that chemists can just -- these rogue chemists can alter molecules to create entirely new chemicals with similar effects. now, they technically my