With a fresh crew now aboard the International Space Station, the four fliers they are replacing — including long-delayed Starliner astronauts Barry "Butch" Wilmore and Sunita Williams — undocked early Tuesday for a long-awaited return to Earth,

Butch Wilmore and Suni Williams are heading home after about nine months at the International Space Station. The two veteran NASA astronauts were only supposed to be in space for a little more than a week.

The two test pilots came to NASA via the Navy. Wilmore, 62, played high school and college football in his home state of Tennessee before joining the Navy. Williams, 59, grew up in Needham, Massachusetts, a competitive swimmer and distance runner.