Russian spacewalk outside space station delayed, astronauts prepare for Friday mission.

A Russian spacewalk to move an experiment airlock from one International Space Station module to another has been postponed to the beginning of May due to the need for a more detailed study of its tasks. The airlock has been attached to Rassvet since 2010, and the move is being made to use the airlock with the newer Nauka laboratory. No other details as to reason for the delay were given.