Pinnacle Airlines (Memphis International) has renamed and rebranded itself as Endeavor Air (9E, Minneapolis St. Paul International) following the unveiling of its new headquarters at Minneapolis St. Paul International. The airline, a Delta Air Lines (DL, Atlanta Hartsfield Jackson) subsidiary will, however, continue to operate aircraft in Delta's livery. A conglomeration of three regional airlines: Pinnacle Airlines (Memphis International), Mesaba Airlines (Minneapolis St. Paul International) and Colgan Air (Boston), Endeavor moved to Minneapolis St. Paul International from Memphis International after emerging from bankruptcy. Among various cost cutting measures, Delta is phasing out Pinnacle's fleet of 140 CRJ200s owing to their alleged uneconomical fuel overheads. The airline will continue to keep its fleet of forty-one CRJ900s with Delta set to allocate it a further 40 CRJ-900s in due course.