Q&A with Mark Mulqueen, Boeing’s space station program manager

Less than a week after winding up a successful spacewalk, outgoing space station commander Jeff Williams, America’s most experienced astronaut, joined two Russian cosmonauts for a fiery return to Earth Tuesday, closing out a 172-day mission with an on-target landing in Kazakhstan.

The United Launch Alliance Delta 4 rocket roars off the pad with the Global Positioning System 2F-9 satellite. Photos by ULA.

A collection of pad photos from the ULA Atlas 5 rocket launch of the X-37B spaceplane on its fourth mission taken by photographer Walter Scriptunas II.