After 166 days docked to the International Space Station, three astronauts land safely in Kazakhstan.

NASA chief Charles Bolden inspected a prototype spacecraft engine that could power an audacious mission to lasso an asteroid.

Astronauts were on mission to International Space Station.

NASA is paying $424 million more to Russia to get U.S. astronauts into space.

NASA blaming Congress for the need to pay $424 million more to get U.S. astronauts into space.