2012 London Olympics: Join our live webcast on CNN March 13, 2012 -- Updated 2017 GMT (0417 HKT) An aerial view of the Olympic stadium with the Aquatics and Water Polo arena in the foreground. 2012 Summer Olympics in London just four months away Pose your questions on the Games to CNN World Sport's Don Riddell Riddell hosts a live webcast on CNN.com, CNN iPhone and iPad apps Wednesday (CNN) -- We're just four months away from the London Olympics and the city is nearly ready to great thousands of athletes and millions of visitors. As part of CNN's coverage of London 2012, World Sport presenter Don Riddell will be presenting a live webcast on CNN.com and CNN iPhone and iPad apps on Wednesday at 5.30pm GMT, 6.30pm CET, 1.30pm ET. Living and working in London, Don has reported on the Games since London got the vote six years ago. What do you want to ask him? Is London ready? Will the city cope? Are there any spare tickets? Can anyone beat Usain Bolt in the 100 meters? Will the Thorpedo make a triumphant return to the pool? Send your questions about anything to do with this summer's Olympics via Twitter to @donriddellcnn and watch the webcast here (http://on.cnn.com/y7hWy3) or on the mainpage of CNN.com International.