>> schieffer: >> pelley: so what are the concerns? >> reporter: scott, there are technical issues. how do you make this safe and effective? but then there are ethical issues raised. you're starting off with a technique meant to prevent devastating illnesses, but there is concern it could be used for designer babies. so-called designer babies, kids who are more intelligent, who have other scwawlts that the parents find desirable. i should say we are way off technically from being able to do this but that's the fear. >> pelley: jon, thank you very much. fascinating. today, the government reported some encouraging news about childhood obesity. ten years ago, nearly 14% of preschoolers ages 2-5 were considered obese, but that has now dropped to just over 8%. one reason is children are drinking fewer sugary drinks. a family strikes gold in their backyard. that story is coming up. up. before those little pieces would get in between my dentures and my gum and it was uncomfortable. [ male announcer ] just a few dabs is clinically proven