Climbers break two world records
More than 300 climbers broke two world records at once on Australia's iconic Sydney Harbour Bridge.
Not only did they break the record for the most people on the bridge (340), they then went on to smash the record for the most number of flags flown off it (219).
A group led by the famous US TV host Oprah Winfrey set the previous record for most people on the bridge in 2011.
The event was organised by the charity Rotary International, to raise money to help fight the disease polio.