Mcc0050037 . Daily Telegraph
Boris Johnson and Michael Bloomberg
Michael Bloomberg today launched the 2013-2014 Mayors Challenge; a competition to inspire European cities to generate innovative new ideas and improve city life alongside the Mayor of London, Boris Johnson, the Mayor of Florence, Matteo Renzi, and the Mayor of Warsaw, Hanna Gronkiewicz-Waltz at London's City Hall .
London 23 September 2013
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