BEVERLY HILLS, Calif. -- Bob Costas and other top members of NBCs Olympics coverage team veered between optimism and caution in predicting Rio de Janeiros ability to pull off a successful Summer Games and said NBC will cover the good and bad.Other Olympics have taken place without significant difficulties and he hopes it will be the same for Rio, Costas said Tuesday. But he then ticked off the daunting list of challenges faced by the Brazilian city.It would be naive to think it isnt grappling with security worries, pollution and political turmoil along with a deep recession thats occurred since Rio won the Games, Costas said.He spoke to TV critics from Rio by satellite, along with executive producer Jim Bell and correspondent Mary Carillo. The opening ceremony airs Friday on NBC, which is carrying the games on the air and online.Whether any city can carry off the immense event is the question heading into virtually every Olympics, Bell said. Then the athletes arrive, the Olympic torch is lit and that is the story the network tells, he said.But if a host city falls short, he said, then NBC should focus on that.Costas said that any security issues or ill effects from contaminated water will be immediately apparent and have to be addressed. So far, the best advice given athletes competing in open-water sailing or swimming events is to close their mouths and keep their heads above water, he added.I guess some new techniques will be required, Costas said, sarcastically, adding, Im not trying to be facetious here, but its going to be impossible, in some cases, not to address some of the issues that have come up before the Olympics, because they will directly (effect) the competition.Many open-water competition test events have been held and resulted in zero problems so far, Bell said.When Carillo chimed in that she will be helping to cover those contests, Costas asked her if she planned to take a dip yourself.Absolutely not, she replied. She added, however, that shes been told that open-water swimmers in the 2012 London Olympics faced dirtier conditions from goose droppings in Hyde Parks Serpentine lake.According to a 16-month-long study commissioned by The Associated Press, the waterways of Rio de Janeiro remain as filthy as ever just days before the Games begin and are contaminated with raw human sewage teeming with dangerous viruses and bacteria.If illness or other crises arise, does NBC bear some responsibility for what happens because of the large license fee it pays to the International Olympics Committee, the NBC team was asked.I dont think so, Bell replied.Costas expanded on that answer, saying that the Rio Games would happen without NBCs involvement. The argument could be made that the IOC should have considered moving or postponing it, given the problems that began emerging months ago, he said.But once the games were being held, the network that owned the rights to televise those games was going to televise them, Costas said, adding that the question about network responsibility becomes how thoroughly and credibly do we cover it.His expectation is that NBC Sports and NBC News will not shy away from that, Costas said.Asked if NBC could have used its financial-stake clout to influence the IOC, Bell said he didnt think so.You could make the case Zika is a bigger story in Florida than in Rio, where it is winter, and cooler and drier, he said. Is Disneyland responsible for bringing people to Florida? Vans Baratas Online .J. -- Marshawn Lynch said Thursday it will be good to get back to football after the Seattle quiet talking running back wrapped up his final mandatory media session of Super Bowl week. Vans Baratas En España . The next step is a better finish. Bae played bogey-free Friday on another gorgeous day at Riviera for a 5-under 66, giving him a one-shot lead over Aaron Baddeley and Robert Garrigus going into the weekend. http://www.baratasvans.es/ . -- On the field, it was business as usual for Jameis Winston and No. Zapatillas Vans Online Rebajas . -- About a third of the way through the regular season, the Washington Wizards are at . Zapatillas Vans Baratas Online . Andrew Luck lost his favourite target and the Indianapolis locker room lost one of its most revered leaders when Reggie Wayne was diagnosed Monday with a torn anterior cruciate ligament in his right knee that will cost him the rest of the season. The top 25 teams in The Associated Press womens college basketball poll, with first-place votes in parentheses, records through Nov. 27, total points based on 25 points for a first-place vote through one point for a 25th-place vote and last weeks ranking:Record Pts Prv1. Notre Dame (16) 6-0 803 12. UConn (14) 4-0 797 23. South Carolina (3) 5-0 766 34. Baylor 7-1 725 55. Maryland 6-0 694 66. Mississippi St. 7-0 636 77. Louisville 6-1 634 48. Florida St. 6-1 551 109. Ohio St. 5-2 546 810. UCLA 5-1 541 911. Stanford 6-1 479 1112. Oklahoma 5-0 445 1313. Washington 6-1 423 1514. Texas 2-2 400 1415. DePaul 5-1 318 1816.dddddddddddd West Virginia 7-0 303 1917. Kentucky 5-1 276 2018. Miami 5-1 245 2119. Florida 4-1 192 1620. Syracuse 4-3 146 1121. Colorado 6-0 116 -22. Tennessee 3-2 99 1723. Auburn 6-1 70 -24. Oregon St. 3-1 69 2225. Texas A&M 5-0 68 -Others receiving votes: South Florida 51, Oregon 49, Arizona St. 45, Michigan St. 36, Virginia Tech 33, Georgia Tech 30, Marquette 26, Michigan 22, California 20, Northwestern 18, Green Bay 10, Gonzaga 7, Oklahoma St. 7, South Dakota St. 7, Kansas St. 6, Missouri 6, Boise St. 5, Duke 5. ' ' '