Delta 4 launch seen from press viewing site (members only)

The United Launch Alliance Atlas 5 rocket stands atop Space Launch Complex 3-East at Vandenberg Air Force Base in California on the eve of Wednesday’s NROL-79 satellite-deployment mission for the National Reconnaissance Office.

The United Launch Alliance Atlas 5 rocket that will hurl the four MMS satellites into a highly elliptical Earth orbit on March 12 has completed its basic build up at Cape Canaveral’s Complex 41 Vertical Integration Facility.

The composite structure of Sierra Nevada Corp.’s first space-rated Dream Chaser space plane has arrived at the company’s Colorado factory for integration with computers, a heat shield and mechanical systems before launch to the International Space Station in late 2021.