Which countries share the Olympic medal podium? Developer Makoto Inoue has taken the Olympic medals data and put it together with D3 to create this fascinating chord diagram which shows which countries share medals. It's organised by sport - the chart below shows cycling in 2008 - and just use the dropdowns to see it change and to alter the year. It is a nifty way of illustrating each country's priorities - and sets the scene for the Olympic data hackathon at the end of July