NASA astronauts Sunita Williams and Butch Wilmore have been ‘stuck’ in space for nearly nine months now.SpaceX and the NASA, had planned on Wednesday, March 12, to launch from Florida a replacement crew of four astronauts,

Sunita Williams and Butch Wilmore have completed over 900 hours of research involving 150 scientific experiments and technology demonstrations during their extended stay on the orbiting laboratory.

America is eagerly awaiting the return of two astronauts who have been stuck on the ISS since last June. Here's who they are.