RIO DE JANEIRO -- British swimmer Fran Halsall landed a trip to the Olympic Stadium.Unfortunately, she was competing at the Olympic Aquatics Stadium.The transportation mix-up left officials scrambling to make sure Halsall and two other swimmers got a chance to compete in the semifinals of the womens 50-meter freestyle Friday night.The whole Olympics had to be stopped for me tonight, unfortunately, Halsall told the BBC.Two hours before the race, she boarded a bus at the Olympic village along with fellow semifinalists Jeanette Ottesen of Denmark and Aliaksandra Herasimenia of Belarus.They thought the bus was taking them to the nearby swimming stadium. Instead, it headed to the stadium used for the athletics competition; the driver apparently failed to heed the protests of the swimmers who wanted to go to the pool.It took us to the Olympic Stadium, which happens to be 40 minutes in the opposite direction to the pool, Halsall said. So I ended up going and having a nice tour around the Olympic Stadium, 40 minutes back to the village and then back to the pool for warm-ups. My emotions and adrenaline were all over the place.At the pool, officials were informed of the problem and altered the nights schedule, moving a pair of medal ceremonies ahead of the 50-free semifinals to give the wayward swimmers extra time to prepare. An announcement was made to the crowd at the start of the competition, but no reason was given for the change.Halsall still managed to qualify for Saturdays final with the fourth-fastest time, and Herasimenia also advanced in the last of eight spots. Ottesen was eliminated.If I get on the right bus tomorrow, everything will be good, Halsall quipped to the BBC. Ray Ban Cyber Monday 2019 . MORITZ, Switzerland -- Fog prevented downhill racers from getting their Olympic dress rehearsal. Cheap Ray Ban Sale .5 million, one-year contract on Friday. 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Argentina hope to get on top of Englands powerful scrum by seeing if they can heap the set-piece pressure on captain Dylan Hartley this weekend.Pumas lock Guido Petti hailed Englands tight-game as the thermometer of Eddie Jones resurgent troops, who are chasing a perfect winning run in 2016.Argentinas classic Bajada scrum technique directs all the force onto the opposing hooker, so England skipper Hartley could be in for a rough ride in Saturdays Twickenham Test.Second row Petti has watched Englands set-piece trials against South Africa and Fiji, and admitted Argentina will aim to impose their authority at the scrum this weekend.The thermometer of this England team is the forwards winning the physicality, said Petti. When they get control there they are very strong. The key in this match is going to be this. Lots of scrums, lots of mauls. The one who dominates these things will dominate the match.The forwards of England are very good, very powerful, very strong. Its good playing teams with these strengths. We want to play against the best and England are one of the best.The Pumas Bajada technique was developed in the 1960s and centres around the second rows binding around the props waists rather than between the legs.That, coupled with a sharply-orchestrated drive, centres the pressure on the opposing hooker. Petti admitted Hartley could feel the brunt of that old-school approach, should Argentina pull it out when the time is right at Twickenham.Yes we can do that, and maybe we have to think which scrums to fight and which ones not to, said Petti of Argentinas unorthodox scrummaging technique.ddddddddddddWe know that the scrum will be a very important area for this match. Our scrum has improved a lot in the past few matches. I think against Scotland we had a great scrum, but England is going to be more difficult.Their physicality is their strength. They are very aggressive. Dylan Hartley is a great player, hes very experienced and he knows how to lead England. But this will be a big battle, and one I think both sides will relish.Argentina know they must beat England to have any chance of avoiding the group of death at World Cup 2019. Victory would edge the Pumas up to eighth, with the World Cup pool draw taking place in May next year.This weekend represents Argentinas last chance to affect their ranking before that pool draw -- and the top eight teams can expect a softer allocation in May, being sorted into the top two pots.One of our objectives is to be in the top eight so our defeat to Scotland was not very good, said Petti. But we can turn things around if we win against England. It is going to be very difficult but we will give it our all.We are really confident despite having two losses on this northern tour. The rankings are very important, but also, if you want to be world champions then you have to beat everyone at some point.Being in the top eight was our objective for the end of the year. This is our last chance. ' ' '