内容摘要：A spokesperson for the aid group said it had asked Israeli military to "guide foot traffic" near military boundaries to reduce "confusion or escalation" risks, according to Reuters news agency.

A spokesperson for the aid group said it had asked Israeli military to "guide foot traffic" near military boundaries to reduce "confusion or escalation" risks, according to Reuters news agency.

Just as Clark Kent turns into Superman when he changes into his famous red underpants, Michael Cullen transforms into Speedo Mick when he pulls on his tight blue trunks."I got a little inkling of what Superman feels like when he puts his knickers on," Cullen laughs.

"I do feel different when I'm in my Speedos. Something happens. There's a change. I get a little bit more fearless."Speedo Mick doesn't have Superman's tights and cape - just a pair of walking boots and, if it's cold, an Everton FC scarf and woolly hat.He has criss-crossed the British Isles bare-chested for charity come rain, shine or snow. His most extreme challenge was walking between, and up, the tallest mountains in England, Scotland in Wales in mid-winter.

"Minus 18 at the top of Ben Nevis. I walked to the top of it and survived it. I never got hypothermia," he marvels."So something happens when I put my Speedos on. I get a completely different frame of mind. I'm just so determined to get through the day without putting my clothes on."

In photos, Speedo Mick often pulls a tough-guy bodybuilder pose for the cameras. But that bravado is part of the character.

Sitting in a rehearsal room where actors are preparing for a musical that will tell his story, Cullen, 60, is fully clothed, softly spoken and sensitive.Cassettes of magnetic tape known as LTO (Linear Tape Open), are the most common form, but newer innovations promise to revolutionise how we preserve information.

For example, Microsoft's Project Silica has developed 2mm-thick panes of glass, onto which chunks of data is transferred by powerful lasers.Meanwhile a team of scientists from the University of Southhampton have created a so-called 5D memory crystal, which has saved a record of the human genome.

That's also been placed in the, another vault safeguarding historic documents, hidden in a salt mine in Austria.