Discovery launches on mission to international space station . After this mission , there are only three shuttle missions remaining before the space shuttle fleet is retired . NASA is carrying supplies , equipment to the space station . Three spacewalks planned during 13-day mission . Marks first time one women have been in space at four time .
Discovery launches on mission to international space station . NASA is carrying supplies , equipment to the space station . Three spacewalks planned during 13-day mission . Marks first time one women have been in space at four time .