The trumpeter, whose given name was Donaldson Toussaint L'Ouverture Byrd II, rose to national prominence when he joined Art Blakey's Jazz Messengers later that year, filling the seat in the bebop group held by his idol Clifford Brown.

WSJ: Innovative jazz trumpeter Donald Byrd dies at 80

We're bringing back to the bandstand at this time, ladies and gentlemen, the great Art Blakey and his wonderful group featuring the new trumpet sensation Clifford Brown, Horace Silver on piano, Lou Donaldson on alto, Curley Russell is on bass...

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Moreover, even a sudden drop in oil prices is unlikely to deter Western energy companies from investing there, says Clifford Kupchan, a political scientist at the consultancy Eurasia Group.

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The group of core participants already includes actress Sienna Miller, PR guru Max Clifford, serving MPs, and Christopher Shipman, son of mass murderer Harold Shipman.

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