Chairman of London Organising Committee of the Olympic and Paralympic Games, Sebastian Coe plants an oak tree at Kew Royal Botanic Gardens in London to mark 100 days before the start of the London 2012 Olympic Games, Wednesday, April 18, 2012. The opening ceremony will take place on July 27, 2012. (AP Photo/Sang Tan)
Chairman of London Organising Committee of the Olympic and Paralympic Games, Sebastian Coe plants an oak tree at Kew Royal Botanic Gardens in London to mark 100 days before the start of the London 2012 Olympic Games, Wednesday, April 18, 2012. The opening ceremony will take place on July 27, 2012. (AP Photo/Sang Tan)