Astronaut Scott Kelly says goodbye to family and friends as he leaves to become the first American to spend a year in space.

Before leaving Earth, astronaut Scott Kelly heads to a once secret space center outside Moscow that is now the scene of an unprecedented collaboration between former enemies.

Scott Kelly begins his long separation from the rest of humanity well before he leaves Earth, as he and his crewmates enter the curious world of pre-flight quarantine

The final hours on Earth are a series of rituals—both technological and personal—as the clock ticks down and the engines ignite.

Watch NASA astronaut Scott Kelly board the International Space Station and adjust to life in space.

Danger lurks both on the ground and in orbit as the crew deals with exploding supply rockets and incoming space debris.

Fixing the space station can mean venturing outside—no easy feat 250 miles away from Earth.

So much rides on the slender thread that connects astronauts in space to family on Earth.

Packing to leave can be bittersweet after a year in space.

By air and land, rescue vehicles converge in the Kazakh steppe to catch three men falling from space.

After a year in space, Scott Kelly and Mikhail Kornienko reunite with their families and begin the long, painful process of readjusting to life on Earth.