the other top choice, stephen biegun, the u.s. special representative for north korea, but like stephen biegun was potentially going to get tapped to be the new u.s. ambassador to russia but he said he didn't want that job. he wants to remain on north korea. he was at odds with john bolton over the approach to kim jong un. stephen biegun thought using a program of carrots could help bring them towards denuclearization and john bolton wanted to use the stick. >> john roberts, thank you. back to the president's comments and apparent action pending on vaping, let's turn to tony, executive director of the vapor technology association. tony, thanks. >> thank you. >> shepard: is vaping safe? >> vaping, we know from scientists, is that vaping is safer than smoking cigarettes. >> shepard: no, it isn't. actually that's not true. because i have a google machine and access to the research, which is worse, smoking or vaping? e-cigarette vapor may not result in an obvious mall or the traditional smoke cigarettes, hasn't negative impact on air