RIO DE JANEIRO -- At these Olympics, its not always the grass thats greener on the other side.Its the diving pool.Think Rio officials were embarrassed they had to hire helicopters and spotters to try and keep sewage out of sailing waters? Now they cant seem to get the green out of the diving pool water.That led to some unusual television Friday as underwater cameras tried to focus on amoebae-like shapes that seemed more sea creature than human diver. In the stands, fans cheered when their favorite diver would suddenly emerge from what looked like green slop.It looked bad, though Rio officials insisted it was not really all that bad. Neither, they said, was the chlorine used in the adjacent water polo pool to make it a lighter shade of green for Fridays play.Still, this isnt exactly what they had in mind when promising the Olympics would go green.It doesnt take a genius to know what they did to the pool, U.S. water polo captain Tony Azevedo said. But it doesnt matter. Play in green water, play in chlorinated water, I mean Im an American. All our water is over-chlorinated, so it doesnt really matter.Friday marked three days since the once blue water began turning green, and two days since Olympic officials insisted it was getting better. So much better that the pool was closed for practice Friday as they frantically tried to clean things up before the womens 3-meter springboard preliminary.It didnt work, although the pool did smell somewhat better than it did in the morning when two German divers posted a picture on Facebook showing themselves covering their noses after practice was cancelled.Olympic officials werent exactly forthcoming on what made the water turn green, though those who clean swimming pools quickly identified it as algae. The officials also werent terribly clear on how algae was somehow allowed to grow in a pool being used for the biggest sporting event in the world.We first learned that chemistry is not an exact science, said Rio 2016 spokesman Mario Andrada.That might come as somewhat of a surprise to actual scientists, who say keeping a swimming pool clean and blue isnt that difficult if certain procedures are followed.To them, its easy not being green.There is some imprecision in maintaining chemistry in a large body of water, said Tom Lachocki, executive director of the National Swimming Pool Foundation in Colorado Springs, Colo. However, maintaining disinfectant in water has been the largest public health advance in the last century. The basic principles of maintaining disinfectant, proper pH, and circulation and filtration are scientifically sound and well established.Lachocki, a chemist himself, said making the pool blue again involves a combination of algaecide, chlorine and the proper pH levels.You get algaecide and proper chlorine and youll see that pool clearing up overnight, he said. Within 12-14 hours youll get cleaner water.Rio organizers can only hope that is true. Theyve battled water issues since being awarded the Olympics seven years ago with the promise they would clean up Guanabara Bay, the sailing venue that remains the collection area for much of the citys untreated waste.Theyve already had to deal with a Belgian woman who won a 2012 bronze medal falling ill after sailing the polluted waters of Guanabara Bay. The last thing they need is for pictures of divers doing flips and twists into green water to be iconic images of these games.We certainly could have done better in the beginning to prevent the water from turning green, Andrada admitted. Once it turned green, we again made another bit of a mistake.Its a mistake that made more than a few divers wary, including Britains Tom Daley, who tweeted after finding the pool closed for practice Friday that Hopefully that means we havent been diving in anything too bad the last couple of days!Hopefully not, because the worst case scenario is always that the water is as nasty as it looks.And no one wants to see divers turn green with anything other than envy.----Tim Dahlberg is a national sports columnist for The Associated Press. Write to him at tdahlberg(at)ap.org or http://twitter.com/timdahlberg Cheapest Air Max 94 . PETERSBURG, Fla. Cheapest Air Max 90 Current . 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With the first unit struggling of late and Amir Johnson - one of the teams iron men - hobbling on an injured right ankle, Patterson knew he could get the nod in a challenging matchup against one of the leagues up and coming players at his position.TORONTO -- When Tyler Hansbrough threw Toronto Raptors centre Jonas Valanciunas to the court during a game in February, it was one example of how his rough-and-tumble style can sometimes cross the line. No foul was called and its not a play Hansbrough wants to make a habit. But thats the kind of aggression around the basket the Raptors are hoping to get out of their newly signed power forward. "Hes going to knock you down," general manager Masai Ujiri said. "I think we need a little bit of that, and were excited to have it." Hansbrough is a small piece of a major reconstruction project for Ujiri and the Raptors. The team must forge a new identity, and if this addition is any indication, it will be one built on defence. "I felt like they could use a guy like me," Hansbrough said. "I can bring a lot of toughness to the team, a lot of hard work and effort and bring some leadership just the way I approach the game and hopefully it will rub off." Hansbrough joins a front court rotation that includes Valanciunas, Amir Johnson and Quincy Acy. The 27-year-old is a career 20-minute-a-game power forward, and Ujiri sees him as a "strong rotation player." Hansbrough would like to be more than that. He has only started 38 of 246 career NBA games, but the North Carolina product figures hes more than just a minor role player. "I can be more than just a 20-minute energy guy coming off the bench at times," he said. "I feel like I can really add that, improve my jump shot and become effective." Defence is uundoubtedly the strength of Hansbroughs game.ddddddddddddHes averaging 8.9 points and 4.7 rebounds but is a solid low-post defender who plays beyond his six-foot-nine, 250-pound frame. Ujiri has seen some development on the offensive end for Hansbrough, who got to the free-throw line 300 times last season, as much as San Antonio Spurs big man Tim Duncan. "All that means is he keeps putting pressure on you and attacking the boards and attacking the rim," Ujiri said. "Hes developed some kind of jump shot from 15 feet. Hes improved. Hes become a mature player and thats kind of what you want with a power forward of that calibre." Naturally, the Raptors didnt get Hansbrough for his offensive prowess. They know what to expect from him. "Toughness, grit, a winner," Ujiri said. "Hes won every step of the way. We want to add those kind of players. Toughness and grit, good experience in the NBA as a power forward." After trading centre Andrea Bargnani to the New York Knicks for Steve Novak, Marcus Camby, swingman Quentin Richardson and a couple of draft picks, Ujiri signing Hansbrough to a two-year deal is just another step in a roster transformation. 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