The peloton sets off from what is now a very sophisticated Camel Track, for stage four...
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A three man escape has moved away in the desert - they look harmless enough..!
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The peloton has realised Andrej Grivko and Gatis Smukulis are in the escape and are very strong - a chase starts..!
Mark Cavendish and Fabian Cancellara have less to worry about with their teamates doing the chasing for them...
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Pirmin Lang is in distinguished company as he leads the escape down a long, long, highway...
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Hayden Roulston is wearing the New Zealand champion's jersey this week - except that he has the Australian flag on it instead..!
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Vacansoleil is chasing, the gap has grown to seven minutes at the halfway mark...
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Argos lend a hand to the chase, but the gap is going up not down..!
Poetry in motion - Evan Huffan gets a perfect wheel change from his Astana mechanic...
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Lawrence Warbasse loads up with bottles on this very warm, windless, day...
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Warbasse is learning his trade well - Steve Cummings gets a cool bottle of water from the youngster...
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Taylor Phinney shields Brent Bookwalter after a wheel change - BMC is nervous about losing the race-lead today...
BMC is now doing the chasing to keep the race lead within the team...
Yoann Offredo is back in the peloton after a suspension - he's become a water-boy during his absence..!
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Grivko leads the escape onto a highway with 25-kilometres left - and they've kept a four-minute lead too..!
Green Edge joins the chase into what is now a headwind - the escape is doomed...
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Mark Cavendish wins stage four from Barry Markus and Andrea Guardini...
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Mark Cavendish becomes the new race-leader of the Tour of Qatar..!