Watch a 4K replay of the Atlas 5 launching for the National Reconnaissance Office

NASA has agreed to consider a Boeing proposal to extend the first piloted test flight of its commercial CST-100 Starliner crew capsule from two weeks to up to six months with an extra crew member for the International Space Station, hedging against potential delays that could jeopardize U.S. crew access to the orbiting outpost.

These photographs span activities in March as the news media got an up-close viewing of the Orbital ATK commercial Cygnus cargo ship, its placement aboard a mobile transporter and delivery of the craft to the United Launch Alliance Atlas 5 rocket assembly building for hoisting and mating. Liftoff is scheduled for April 18.

The launch of three experimental remote sensing satellites last week signaled the resumption of Chinese space launches following multiple rocket failures since late last year, but a senior Chinese space official has confirmed the Chang’e 5 mission to return samples from the moon remains grounded.