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Outrage over the fact she was allowed to compete despite testi testing positive two months before the games and making a mockery of clean competition and others saying it's tainting the moment athletes and figure skaters worked so hard towards. and i was sitting there watching these other skaters pour their hearts out, it's devastating to know even if they make it in the top three, they'll likely be deprived of the medal ceremony, bianna? >> it's hard not to feel for valiyeva, 15 years old, under a lot of pressure but this is an issue of fairness and russia has gotten a free pass for so many y...

Unbreakable windows. you saw what happened in a demonstration. is this a p.r. nightmare for a company? >> melissa: at the terrible p.r. nightmare. glass is one of the hardest products. this was a big thing around the apple iphone, when they said they would be glass and they had to make them so they wouldn't break. this is one of the most difficult things to design. my understanding is that when they tested it they have the glass windows outside the car. they weren't installed at the time. and they threw all kinds of things at them. so it probably has something to do with the differential of it...

Industry and too much emphasis is put on one test where that time spent you could be proficient in a musical instruments. "the wall street journal" called it a mert tok racy waterloo. so is the entire college add migs tournaments which weighs opportunities, race, character. testi testi testing is at least objective. >> test scores aren't measured, merit. they measure a skill at taking a test which is not the same as being good in school. in fact research by the testmakers themselves shows that high school grades, your tests that you've taken in high school, the rigor of courses you've taken, i...

Showdown", north korea takes on the war. after the singapore summit, the president said there is no longer a nuclear threat. this morning he said after the first summit, all the danger went away. while nuclear weapons testing and long-wrong nuclear ballistic testi testing, there shhas been shor - short-range testing. is in a risk that the president may be being played for this historic photo-op? >> reporter: well, the north koreans always try to play americans, chinese, russians, south koreans. so of course there is that risk. indeed, kim jong-un has not made a strategic decision to give up hi...