Video: Pegasus and CYGNSS pre-launch news conference

A Falcon 9 rocket lifted off from Vandenberg Air Force Base on the Pacific coastline northwest of Los Angeles on Friday night, sending 10 Iridium communications satellites toward orbit on a previously-flown first stage booster.

A Falcon 9 rocket lifted off from Vandenberg Air Force Base at 4:39 a.m. PDT (7:39 a.m. EDT; 1139 GMT) Wednesday, and SpaceX successfully landed the rocket’s first stage on a drone ship in the Pacific Ocean. The mission’s primary objective is the deployment of 10 Iridium Next communications satellites into low Earth orbit.

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.