Gallery: Antares rocket explodes

Orbital Sciences Corp. plans to select a long-term propulsion supplier for the Antares rocket used to launch cargo to the International Space Station in the next few weeks, in time to include a potentially redesigned launcher in a bid for a follow-on NASA resupply contract.

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.

Watch the post-launch news conference from the Kennedy Space Center following the successful launch of an Atlas 5 rocket on December 6, carrying the Orbital ATK Cygnus cargo ship bound for the International Space Station.