Cygnus CRS OA-5

Return-to-flight for Antares after the Orb-3 pad explosion two years earlier, now in the new Antares 230 configuration with factory-fresh Russian RD-181 main engines replacing the AJ-26 derivatives implicated in the Orb-3 failure. The Mid-Atlantic Regional Spaceport's Pad 0A had been rebuilt during the gap.