Internal "what-happened" report on this flight:

DL 1819 RDU-ATL, ship127 (767) STD 1440 with 250 passengers diverted to GSP due to maintenance (blown bleed duct). The flight declared an emergency and emergency equipment met the aircraft on arrival.
The aircraft landed and taxied to the gate without incident. After evaluation, maintenance determined that parts and tools would be needed to correct the problem. The aircraft was removed from service and the flight was cancelled. Forty passengers were rebooked on later flights; two were provided overnight accommodations while the remaining passengers were provided ground transportation from GSP to ATL. Customer reaction/emotion was mixed. Many thanked the flight crew, others were crying while some were upset with
the lack of exact details surrounding the situation. Local news media was involved.