US astronauts complete 200th ISS spacewalk
NASA astronauts Peggy Whitson and Jack Fischer successfully completed the 200th spacewalk for the $100-billion International Space Station (ISS). Spacewalkers have now spent about 1,247 hours and 55 minutes working outside the station for assembly and maintenance of the Earth-orbiting laboratory. ISS' first spacewalk was conducted on December 7, 1998, by NASA astronauts Jerry Ross and Jim Newman.