Space Station Stage 7A.1 Welcome to Spaceflight Now's comprehensive coverage of the international space station, its full-time residents and the next shuttle assembly mission, flight STS-105/ISS-7A.1 of Discovery that will exchange the Expedition crews living aboard the outpost. NASA refers to STS-105 and the Expedition Two and Three rotation as "Stage 7A.1" in the space station assembly matrix. This page incorporates that approach. We will post data on upcoming shuttle assembly flights as each stage is completed. E-mail us your comments, suggestions and corrections! Top Stories Expedition Two astronauts shuttled back to Earth Space shuttle Discovery landed at the Kennedy Space Center Monday, bringing home the second resident crew to live and work aboard the international space station after their 167-day expedition in orbit.    FULL STORY    MISSION STATUS CENTER    DETAILED ENTRY AND LANDING TIMELINE More mission coverage here:       Video coverage for subscribers only:    VIDEO: DISCOVERY LANDS IN FLORIDA QT or RV    MORE: COMPLETE LANDING VIDEO INDEX Discovery departs station The shuttle Discovery undocked from the international space station Monday, leaving a fresh three-man crew behind and bringing the lab's departing Expedition Two crew one step closer to Earth after five-and-a-half months in space.    FULL STORY    MISSION STATUS CENTER - updates    DETAILED UNDOCKING TIMELINE    ASTRONAUTS' MASTER FLIGHT PLAN Video coverage for subscribers only:    VIDEO: WATCH ENTIRE FAREWELL CEREMONY QT or RV    VIDEO: SHUTTLE UNDOCKS FROM STATION QT or RV    VIDEO: SIMPLESAT LAUNCHED FROM DISCOVERY QT or RV    MORE: FULL VIDEO INDEX Leonardo module put back into shuttle's payload bay The Italian-built Leonardo cargo module was detached from the international space station Sunday and returned to shuttle Discovery's payload bay for the trip back to Earth. The reusable module delivered over three tons of supplies and equipment to the station for the new Expedition Three crew. Discovery is slated to undock from Alpha on Monday.    MISSION STATUS CENTER - updates    ASTRONAUTS' MASTER FLIGHT PLAN Spacewalkers lay backup cables for future assembly Astronauts Daniel Barry and Patrick Forrester attached handrails and two 45-foot-long emergency power cables to the hull of the international space station Saturday during a successful spacewalk. The cables will provide backup power for a giant truss segment scheduled for attachment next year.    FULL STORY    ASTRONAUTS' MASTER FLIGHT PLAN    QUICK-LOOK MISSION FACTS    FULL MISSION COVERAGE Video coverage for subscribers only:    VIDEO: BARRY EXITS AIRLOCK FOR SPACEWALK QT or RV    VIDEO: SPACEWALKER ATTACHES HANDRAIL QT or RV    VIDEO: FORRESTER POSES WITH DISCOVERY'S NOSE QT or RV    VIDEO: SPACEWALKERS UNREEL CABLING QT or RV    VIDEO: SATURDAY'S MISSION STATUS BRIEFING QT or RV    MORE: FULL VIDEO INDEX Changing of the guard aboard space station Alpha The Expedition Two commander Yuri Usachev officially handed command of the international space station to Expedition Three commander Frank Culberston in a ceremony in the U.S. Destiny laboratory module on Friday.    MISSION STATUS CENTER Video coverage for subscribers only:    VIDEO: CHANGE OF COMMAND CEREMONY QT or RV    VIDEO: CREW NEWS CONFERENCE QT or RV    VIDEO: MEET THE EXPEDITION THREE CREW QT or RV    VIDEO: FRIDAY'S MISSION STATUS BRIEFING QT or RV    MORE: FULL VIDEO INDEX Spacewalk success on station's 1,000th day Two Discovery astronauts -- Dan Barry and Pat Forrester -- stepped outside the shuttle Thursday for a 6-hour spacewalk that successfully mounted an ammonia servicing unit and two suitcase-shaped experiments to the exterior of the international space station.    MISSION STATUS CENTER    SPACEWALK STATISTICS    ASTRONAUTS' MASTER FLIGHT PLAN    QUICK-LOOK MISSION FACTS    FULL MISSION COVERAGE Video coverage for subscribers only:    VIDEO: SPACEWALKERS ATTACH AMMONIA SERVICER QT or RV    VIDEO: CREW MARKS STATION'S 1000-DAY MILESTONE QT or RV    VIDEO: THURSDAY'S MISSION STATUS BRIEFING QT or RV    VIDEO: SPACEWALK PREVIEW REPORT QT or RV    VIDEO: CULBERTSON SHOWS OFF HIS 'STATE ROOM' QT or RV    MORE: FULL VIDEO INDEX Expedition 3 crew moves in, cargo module attached As the Expedition 3 astronauts moved into their new home aboard space station Alpha Monday, the shuttle crew has used Discovery's robotic arm to attach the Leonardo cargo module to the outpost's Unity node.    MISSION STATUS CENTER Video coverage for subscribers only:    VIDEO: MONDAY'S MISSION STATUS BRIEFING QT or RV    SNAPSHOT: LEONARDO HOISTED FROM PAYLOAD BAY    SNAPSHOT: MODULE NEARS UNITY NODE    MORE: FULL VIDEO INDEX Discovery arrives at station with Expedition 3 crew Space shuttle Discovery crossed the finish line of its two-day race to the international space station on Sunday, docking to the orbiting outpost about 250 miles above northwestern Australia. The main objective of Discovery's visit is the exchange of resident crews living aboard the outpost.    FULL STORY Video coverage for subscribers only:    VIDEO: DISCOVERY APPROACHES STATION QT or RV    VIDEO: SHUTTLE DOCKS TO ALPHA QT or RV    VIDEO: MISSION SUMMARY QT or RV (Running time 5 mins)    VIDEO: STS-105 CREW FEATURE QT or RV (Running time 4 mins)    MORE: FULL VIDEO INDEX Life aboard Discovery The astronauts aboard space shuttle Discovery provided an insight into life aboard the ship on Saturday by downlinking some video of activities, including the crew conducting experiments, a dramatic view of a maneuvering engine firing, exercising to keep in shape in space and a birthday celebration far from home. Additional coverage for subscribers only:    VIDEO: CULBERTSON PERFORMS MEDICAL TEST QT or RV    VIDEO: SHUTTLE MANEUVERING ENGINE FIRED QT or RV    VIDEO: HOROWITZ EXERCISES ON MIDDECK QT or RV    VIDEO: STURCKOW CELEBRATES HIS 40TH BIRTHDAY QT or RV Shuttle crew gear up for Sunday's station linkup The crew of space shuttle Discovery spent its first full day in space preparing for Sunday's planned 2:38 p.m. EDT docking with the international space station. They have set up rendezvous tools and docking equipment and fired thrusters to fine tune their approach to the station.    MISSION STATUS CENTER - updates    ASTRONAUTS' MASTER FLIGHT PLAN    DETAILED DOCKING TIMELINE    QUICK-LOOK MISSION FACTS    ORBIT OPS SNAPSHOT Additional coverage for subscribers only:    VIDEO: SATURDAY'S MISSION STATUS BRIEFING QT or RV Discovery launches with next Alpha resident crew The shuttle Discovery rocketed away from NASA's Florida spaceport Friday and set off after the international space station, carrying a fresh three-man crew and nearly four tons of supplies and equipment, including yet another sorely needed command-and-control computer.    FULL STORY    QUICK-LOOK MISSION FACTS    ORBIT OPS SNAPSHOT Additional coverage for subscribers only:    VIDEO: LAUNCH OF DISCOVERY QT or RV    VIDEO: ONBOARD CAMERA RECORDS COCKPIT VIEW QT or RV    VIDEO: LIFTOFF AS SEEN FROM VAB ROOF QT or RV    VIDEO: DRAMATIC VIEW FROM IN FRONT OF PAD QT or RV    VIDEO: CLOSE-UP VIEW OF MAIN ENGINES QT or RV    VIDEO: PAD PARAMETER LAUNCH VIEW QT or RV    VIDEO: BEACH TRACKER REPLAY QT or RV    VIDEO: VIEW OF LAUNCH FROM PRESS SITE QT or RV    VIDEO: SOLID ROCKET BOOSTER SEPARATION QT or RV    VIDEO: ASTRONAUTS DEPART QUARTERS FOR LAUNCH QT or RV Stubborn storms scrub shuttle Discovery's launch Thunderstorms forced NASA to call off Thursday's planned launch of the space shuttle Discovery on space station crew exchange mission. Liftoff has tentatively been rescheduled for 5:15:12 p.m. EDT (2115:12 GMT) on Friday. Check the status center for further updates.    MISSION STATUS CENTER    COUNTDOWN EVENTS CHART Shuttle countdown begins The three-day countdown is underway at Kennedy Space Center for Thursday's launch of space shuttle Discovery on a taxi mission to exchange the resident crews of the international space station. Officials reviewing the cracked solid rocket booster fuel injector have concluded the issue does not pose a safety threat to Discovery.    MISSION STATUS CENTER Earlier Stories No decision yet on possible shuttle Discovery repairs The seven astronauts who will ride space shuttle Discovery into orbit during this week's scheduled launch arrived at Kennedy Space Center on Sunday amid ongoing analysis about cracks found in a critical solid rocket booster system.    MISSION STATUS CENTER    EARLIER STORY Discovery taking ovarian tumor cells into space When the space shuttle Discovery blasts off, it will take ovarian cancer into space for the first time. The ovarian cancer cells are headed to the space station to develop three-dimensional cancer cell clusters that function more like cancer in humans than the two-dimensional cell cultures traditionally grown in petri dishes.    FULL STORY Station science team set for change of expeditions The international space station crew and ground teams are preparing to conclude one successful science expedition and begin another. Three Expedition Two experiments returned home aboard shuttle Atlantis recently. Expedition Three will have 18 experiments, including 10 continuing from Expedition Two, as well as eight new experiments.    FULL STORY NASA studies shuttle solid rocket booster problem Space shuttle engineers are investigating cracks found inside a solid rocket booster hydraulic steering unit that could force NASA to delay next week's planned blastoff of Discovery.    FULL STORY Shuttle launch pads filled for summer station missions For the first time in 18 months both space shuttle launch pads at Kennedy Space Center are occupied following Monday's rollout of Discovery in preparation for blastoff in August on a mission to exchange the resident crew aboard the international space station. Discovery joins sistership Atlantis, which was rolled out June 21.    FULL STORY [Posted: July 2] Past Missions Quest airlock added to international space station The Joint Airlock Quest was delivered to the international space station in July by space shuttle Atlantis, giving the outpost a new doorway for American and Russian spacewalkers.    FULL COVERAGE Station gets an arm and first tourist The crew of space shuttle Endeavour delivered the Canadian-built robotic arm to the international space station in April. The shuttle visit was immediately followed by Dennis Tito's historic joyride to the outpost.    FULL COVERAGE Station pioneers back on Earth after historic voyage After a dramatic reversal of fortune, the shuttle Discovery dropped out of orbit and glided to a pre-dawn landing at the Kennedy Space Center on March 21, bringing the international space station's first full-time crew back to Earth after a 141-day space odyssey.    FULL COVERAGE 2001 began with flawless lab delivery The shuttle Atlantis delivered the $1.4 billion U.S. Destiny laboratory module to the international space station in February during a highly successful mission.    FULL COVERAGE Station's power-generating solar wings spread In December the astronauts of space shuttle Endeavour bolted a $600 million solar power tower to the international space station and unfurled the most powerful solar wings ever launched.    FULL COVERAGE Building a space outpost The crew of space shuttle Discovery carried out a complex four-spacewalk construction mission in October to mount a truss structure with gyroscopes and communications gear to the international space station and add another docking port.    FULL COVERAGE				Status Summary See the Status Center for full play-by-play coverage.