Gallery: Antares rocket explodes

The first sign of failure during the doomed launch of an Orbital Sciences Corp. Antares rocket from Virginia came from the rocket’s first stage about 15 seconds after liftoff.

Frank Culbertson, a former shuttle and station astronaut and now head of Orbital ATK’s space systems group, spoke with Spaceflight Now’s Stephen Clark on the sidelines of the 2015 International Symposium for Personal and Commercial Spaceflight.

Two-and-a-half days after launch from Virginia, a Northrop Grumman Cygnus supply ship arrived at the International Space Station Tuesday with nearly 7,500 pounds of cargo. Capture with the station’s robotic arm occurred at 4:05 a.m. EST (0905 GMT).