Australian chimney demolished in controlled explosion
20 February 2014 Last updated at 15:45 GMT
Thousands of people have gathered in the Australian city of Wollongong to watch the demolition of a 200 metre high chimney stack.
The homes of 250 local residents were evacuated to make sure nobody was injured as the structure - part of the Port Kembla copper works - came down in a controlled explosion.
Adrienne White reports.