Paris mayor swims in Seine as river is cleaned up just in time for Olympics

Anne Hidalgo fulfils pledge after cleanup operation makes water quality safe enough to host events at Games

It has been the dream and promise of Paris mayors for decades and a nightmare for Olympic organisers: could the Seine be cleaned up enough to swim in and hold triathlon and other events?

For the last 100 years and up until a few days ago, the answer seemed to be no.