answer. laura: we all watch tv and we want answers right away and we want to solved like csi. but the common denominator here in the vaping illnesses and device. walmart announced yesterday it will stop selling e-cigarettes at sam's club as well. and the president is weighing in, while i like the vaping alternative to cigarettes, we need to make sure this alternative is safe for all. let's get counterfeits off the market and keep young children from vaping. he brings up a point about the counterfeit, that that's also a concern, but the question i have is, is e-cigarettes, do they really help smokers quit? >> that's another great question and the reality is that there are several studies that suggest that they might, but it's not definitive and there are some studies that suggest that they're not quite effective and we do think that there are f.d.a. approved products that haven about shown to be safe that we know are effective at