Premiere of underwater opera in Germany
10 August 2012 Last updated at 19:09 BST
An underwater opera is to have its world premiere on - and below - the River Elbe in Dresden in Germany.
The performance aims to commemorate the victims of a flood disaster in Saxony 10 years ago.
After starting out on land, soprano Claudia Herr will dive into the river, wearing a breathing device and accompanied by cameras.