Video: Scott Kelly’s in-flight news conference before landing

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.

Ruling out a strike by space debris or a micrometeoroid, Russian engineers say a small now-plugged leak in a Soyuz crew ferry ship docked to the International Space Station was the result of a hole drilled into the wall of the spacecraft’s upper compartment, an apparent case of human error.

An atmospheric test model of Sierra Nevada’s Dream Chaser space plane is being readied for tow and landing tests at NASA’s Armstrong Flight Research Center in California this spring.