i'm siena. we'll start with our top story. if you're a sports fan, you know steroids are bad news. superstars like lance armstrong have fallen into disgrace for cheating with performance-enhancing drugs, but millions of american teens could be using those illegal substances without even knowing it. scott has the story. >> let's call him "steve." he agreed to talk with "teen kids news" about the supplements he uses to beef up. >> i started taking supplements when i was a senior in high school -- 12th grade. >> he's not unusual. it's estimated that more than 12 million middle- and high-school students are buying what are called "supplements." over several years of bodybuilding, steve has developed a regular regimen of several powders that he feels gives his body a boost. >> after i add the protein, i would add about a tablespoon of l-glutamine...which is supposed to increase muscle endurance. >> you can buy these things in stores, but that doesn't mean they're safe. >> sadly, that's not the case. why? because these drugs are -- these supplements are unregulated. well, what do i mean

i'm siena. we'll start with our top story. thousands of cheering spectators. contestants from all over the world. fierce challenges. glorious victories. the olympics, right? nope. emily explains. >> is this gonna be the best year ever, fans? [ cheers ] >> they have a lot to cheer about. from 42 states and 14 countries, these teams have made it to the finals of a global competition called "destination imagination." >> i am standing in front of 10,000 of the smartest, most creative, amazing problem-solvers in the entire world. >> destination imagination, or d.i. for short, was held at the university of tennessee in knoxville. to make it here, the teams had to find solutions to challenges that involve the "4 c's"... ed the four ed >> well, i think it's critical in terms of developing problem-solvers and independent learners, kids who can collaborate with teams. >> at the start of each season, the teams decide which of seven challenges they want to take on. to meet the challenge might require skills like science and math, or maybe theatre know-how, and, of course,

each of the site is a beguiling who accidently husband and as the teams and the getz examinations of siena guys it's not time when i've the time it really did insist that the making situations that unless i'm really overwhelmed by the expression of solidarity from everyone especially from young people here civil society. and even online on social media that the city of the movie the insider says he's optimistic that concrete action that might come out of these meetings in warsaw but added that he knows the process takes time and that he's under no illusions really run bird cctv in warsaw. russia and south korea have both declared that the dprk as a nuclear power is unacceptable. the remarks came as a joint press conference dalby south korean president park in haiti and her russian counterpart to the email posted a few hours ago in seoul. yet president putin arrived in the capital to hold talks with president talk of a joint projects which the three countries have agreed to in september well the guy on the sidelines of the g twenty summit in st petersburg the two presidents have witnessed t

and the siena ron's capital.of thousands of people packed the streets in tehran in the biggest anti--american rally in years. these take place every year to mark the anniversary of the 1979 takeover that followed the islamic resolution -- revolution. this is the largest in years. meanwhile, in egypt, the post president mohamed morsi appear for trial. this was his first public appearance since he was ousted on july 3. mohamed morsi and 14 other defendants in the case could ace the death penalty. -- based the death penalty. the wall street journal reports eric schmidt is slamming the nsa for reportedly spying on the data centers, dolling it potentially illegal. he is registered complaints with the nsa, president obama and members of congress. we will hear more about the nsa and privacy issues at 10:00 eastern when we bring you live coverage of the president privacy and civil liberties oversight meeting. it is actually starting right now live on c-span to or watch it later anytime on our website at www.c-span.org. t

>> siena. >> she is cute. ere are you from >> rochester. >> rochester.you from? >>outh carolina. >> go to weather channel on cable and weather.com onne. savannah. >>> thank u so much. now to the latest con tetestant havehe scales t against him on the biggest loser. let's show you him before he began his journey. here's what's leftf him this morning. good morning to you. you look fabulous. comeown here. haveo meet you. you started at 385 pounds. how much do you weigh now? >> 265 pounds. >> what do you wt that t-shirt to say when thiss all sai and done. >> 192. >> so you were eliminated from the ranch. there was a contrersy with the traine giving caffeine pill was it fair for the team to get penalized? >> it was fair. they wanted to make sure it was ndled fairly. >> she stands by her decision. >> yes, yes. so it is something we a can learn from. it was a good opportunity for the whole group. >> now, where a you from? >> wilson, north carolina. >> you have been continuingith your exercise efforts. did i read you workout three times a day. >> i am. >> you ha