Orbital ATK CRS-9 on the Pad (NHQ201805200007) by NASA HQ PHOTO Via Flickr: The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, is seen at launch Pad-0A, Sunday, May 20, 2018 at Wallops Flight Facility in Virginia. The Antares will launch with the Cygnus spacecraft filled with 7,400 pounds of cargo for the International Space Station (ISS), including science experiments, crew supplies, and vehicle hardware. The mission is Orbital ATK's ninth contracted cargo delivery flight to ISS for NASA. Photo Credit: (NASA/Aubrey Gemignani)

Orbital ATK CRS-9 Rollout The controller for an Orbital ATK rocket is seen just before it is rolled out to launch Pad-0A at Wallops Flight Facility Thursday, May 17, 2018 at Wallops Island, VA. The Antares will launch a Cygnus spacecraft on a cargo resupply mission to the International Space Station. The mission is Orbital ATK’s ninth contracted cargo delivery flight to the space station for NASA. Included in the 7,400 pounds of cargo onboard Cygnus, are science experiments, crew supplies, and vehicle hardware. Photo Credit: (NASA/Aubrey Gemignani)

Orbital ATK CRS-9 on the Pad  The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, is seen at launch Pad-0A, Sunday, May 20, 2018 at Wallops Flight Facility in Virginia. The Antares will launch with the Cygnus spacecraft filled with 7,400 pounds of cargo for the International Space Station (ISS), including science experiments, crew supplies, and vehicle hardware. The mission is Orbital ATK's ninth contracted cargo delivery flight to ISS for NASA. Photo Credit: (NASA/Aubrey Gemignani)

Orbital ATK CRS-9 on the Pad (NHQ201805200004) by NASA HQ PHOTO Via Flickr: The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, is seen at launch Pad-0A, Sunday, May 20, 2018 at Wallops Flight Facility in Virginia. The Antares will launch with the Cygnus spacecraft filled with 7,400 pounds of cargo for the International Space Station (ISS), including science experiments, crew supplies, and vehicle hardware. The mission is Orbital ATK's ninth contracted cargo delivery flight to ISS for NASA. Photo Credit: (NASA/Aubrey Gemignani)

Orbital ATK CRS-9 on the Pad (NHQ201805200003) by NASA HQ PHOTO Via Flickr: The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, is seen at launch Pad-0A, early Sunday, May 20, 2018 at Wallops Flight Facility in Virginia. The Antares will launch with the Cygnus spacecraft filled with 7,400 pounds of cargo for the International Space Station (ISS), including science experiments, crew supplies, and vehicle hardware. The mission is Orbital ATK's ninth contracted cargo delivery flight to ISS for NASA. Photo Credit: (NASA/Aubrey Gemignani)

Orbital ATK CRS-9 Raising on the Pad (NHQ201805180007) by NASA HQ PHOTO Via Flickr: The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, is raised at launch Pad-0A, Friday, May 18, 2018 at Wallops Flight Facility in Virginia. The Antares will launch with the Cygnus spacecraft filled with 7,400 pounds of cargo for the International Space Station (ISS), including science experiments, crew supplies, and vehicle hardware. The mission is Orbital ATK's ninth contracted cargo delivery flight to ISS for NASA. Photo Credit: (NASA/Aubrey Gemignani)