Australia's Beijing 2008 Olympic diving gold medallist Matt Mitcham (L) and silver medallist Melissa Wu (R) pose with the Boxing Kangaroo as the Australian Olympic Committee (AOC) in Sydney . AFP Photo / William West
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In this photo issued by London 2012 London Organizing Committee of the Olympic and Paralympic Games (LOCOG), 260 Guardsmen from the Grenadier, Coldstream, Scots and Welsh Guards mark 100 days before the London 2012 Olympic Games at Horse Guards Parade in central London. The opening ceremony will take place on July 27, 2012. (AP Photo/LOCOG)
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Australia's Beijing 2008 Olympic diving gold medallist Matt Mitcham (R) poses with the Boxing Kangaroo as the Australian Olympic Committee (AOC) in Sydney . AFP Photo / William West
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British and Filipino embassy staff, led by British Ambassador to the Philippines Stephen Lillie, third from right, front row, make the ceremonial 100m race to mark the 100 days countdown to the 2012 London Olympics. (AP Photo/Bullit Marquez)
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Australia's Beijing 2008 Olympic diving silver medallist Melissa Wu (L) talks to the Boxing Kangaroo as the Australian Olympic Committee (AOC) in Sydney .AFP Photo / William West
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This file photo shows a general view of the London 2012 Olympic Velodrome, at the Olympic park in London. (AP Photo/Alastair Grant, File)
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This photo shows swimmers competing in the men's 1500 meter freestyle during the British Swimming Championship selection trials and Olympic test event at the London 2012 Olympic Aquatics Centre at the Olympic Park in London. (AP Photo/Sang Tan, File)
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Marks the 100-day countdown to the London Olympics. As London organizers put the finishing touches on the venues and city officials prepare for an invasion of fans, athletes around the world are training for the big moment. (AP Photo/Tom Hevezi, File)
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Children stand on a giant sand castle built on Weymouth beach to mark 100 days to go to the London 2012 Olympic Games, in Weymouth, southern England. Weymouth and Portland will host the Olympic and Paralympic sailing at the London 2012 Olympic and Paralympic Games. The photograph was taken to mark the 100 days milestone which is on. Reuters/Locog//Handout
