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The aircraft are flown by regular RAF aircrew.

Details of such operations are classified for the security of the U.S. military aircrews that transport the men.

But the aircrews here in Jordan insist they are making a difference, that they are filling a gap - not least while there is simply not enough aid getting through by road or sea.

The aircrew on board have done this flight a dozen times.

“Our thoughts remain with the families and squadron mates of our CV-22 aircrew and we extend our sincerest gratitude to every asset who assisted in the search,” Williams said in a statement.