It is reported that one fired by Splendid, its sole cruise-equipped submarine, failed to explode.

ECONOMIST: The shadow over Westminster

Scientists reported that they found DNA matching that of an electrician from South Armagh, Sean Hoey, in the TPUs of four devices that failed to explode.

BBC: Omagh: 10 years on

The five were arrested on Saturday in connection with the discovery of a mobile phone rigged to detonate a bomb which failed to explode during the attacks.

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It was the only bomb which had failed to explode.

BBC: Stanley Ross remembers the Blitz

At the time, weapons experts said as many as one in 10 bomblets failed to explode on impact and posed a considerable danger, particularly to children who were attracted to them because of their bright coloring.

CNN: rations

But the pipeline that took Turkmen energy supplies to Russia ruptured in April 2009, after Moscow failed to tell Ashgabat that it had significantly lowered its import level of natural gas, causing the pipeline to explode due to the increased pressure.

FORBES: Turkmenistan: Desperate for a Gas Market