Wednesday marks 100 days to go until the opening ceremony of the London Olympics . The IOC has said it will hold a special session in Rio de Janeiro on Friday and Saturday next week for athletes who have not yet been selected. Venues are on schedule and within budget ; tickets sales have been strong . London 's aging transport system and security are two of the major issues remaining .
Wednesday marks 100 days to go until the opening ceremony of the London Olympics . London will become the first city to host the Olympics three times in the modern era . Venues are on schedule and within budget ; tickets sales have been strong . London 's aging transport system and security are two of the major issues remaining .