Q&A with Elon Musk, SpaceX’s founder and CEO

Veteran cosmonaut Fyodor Yurchikhin and rookie flight engineer Jack Fischer streaked into orbit aboard a Russian Soyuz ferry craft Thursday, chased down the International Space Station and glided to a smooth docking to complete a six-hour rendezvous.

Space station commander Jeff Williams and astronaut Kate Rubins plan to carry out their second spacewalk in two weeks Thursday, venturing back outside to retract a cooling radiator, install a high-definition TV camera, replace a burned-out light and inspect struts attached to a large solar array rotary mechanism.

Astronaut Scott Kelly and cosmonaut Mikhail Kornienko ended a record-setting 340-day stay in orbit with a fiery plunge to Earth Tuesday, settling to a jarring rocket-assisted touchdown in Kazakhstan to close out a medical research voyage that may help pave the way for flights to Mars.