Live coverage: Space station crew safely returns to Earth

Boeing Co. and SpaceX, selected by NASA last month to carry astronauts to the International Space Station, can resume development of their human-rated spacecraft after officials ordered a work stoppage prompted by a protest by Sierra Nevada Corp., the company left out of the contracts.

Watch a replay of the pre-launch news conference for the SpaceX CRS-10 space station resupply mission is held at the Kennedy Space Center Press Site on February 17, 2017.

A massive spacecraft bound for Mars lifted off on a Russian Proton rocket Monday, riding more than 2 million pounds of thrust from the launcher’s six main engines through low clouds hanging over the Baikonur Cosmodrome in Kazakhstan.