2012 Summer Olympic development
The 2012 Summer Olympic development process began in 2005, following the successful London bid for the 2012 Summer Olympics, and ran until the games in 2012. While many of the plans were included in the bid portfolio, which gained the favour of the International Olympic Committee (IOC) over the four other bids on 6 July 2005, there were more details released and decisions made afterwards.
Source: Wikipedia — 2012 Summer Olympic development (CC BY-SA 4.0)