Gallery: Antares rocket explodes

Watch the briefing to learn what is aboard the Orbital ATK Cygnus OA-6 resupply freighter launching to the International Space Station on March 22 aboard a United Launch Alliance Atlas-5 rocket.

Bidding farewell to the International Space Station today, the commercial Cygnus cargo ship separated to a safe distance before igniting an intentional fire in microgravity like never before, all in the name of science.

The Centaur upper stage launching the Cygnus space freighter Tuesday persevered through a velocity shortfall from the first stage of the Atlas 5 rocket, improvising with a longer firing to reach the correct orbit.