12.12.06 - Discovery and its seven-member crew lifted off Saturday, Dec. 9, from NASA's Kennedy Space Center at 8:47 p.m. EST. Low clouds delayed Discovery's launch on Thursday night.
12.08.06 - The next launch attempt on mission STS-116 is currently scheduled for no earlier than Saturday, Dec. 9, at 8:47 p.m.
11.22.06 - Technicians have completed prelaunch propellant servicing in preparation for Space Shuttle Discovery's launch to the International Space Station, set for no earlier than Dec. 7.
11.17.06 - Following Space Shuttle Discovery's arrival at Launch Pad 39B on Nov. 9, technicians began final preparations for the STS-116 launch set for no earlier than Dec. 7
11.02.06 - On Tuesday, drivers moved Space Shuttle Discovery atop the 76-wheeled orbiter transporter system from the Orbiter Processing Facility to the Vehicle Assembly Building.
10.20.06 - In OPF bay 3, the work to repair the damage to orbiter Discovery's right-hand external tank door mechanism is finished, and the door functional test is complete.
10.13.06 - Technicians continue performing final closeouts on Space Shuttle Discovery in preparation for rollover to the Vehicle Assembly Building, currently scheduled for Nov. 1.
10.06.06 - During Thursday's Program Requirements Control Board meeting, Space Shuttle Program managers discussed the self-imposed restriction to daylight launches of the last two missions.
09.28.06 - During today's Program Requirements Control Board meeting, Space Shuttle Program management moved the target launch date for Discovery to no earlier than Dec. 7.
09.05.06 - At Launch Pad 39B, preparations for Wednesday's launch of Space Shuttle Atlantis on mission STS-115 are under way. The external tank camera functional test is complete.
09.04.06 - At Launch Pad 39B, preparations for Wednesday's launch of Space Shuttle Atlantis on mission STS-115 are under way. The launch countdown began on Sunday at 8 a.m.
09.01.06 - At Launch Pad 39B, preparations for Wednesday's launch of Space Shuttle Atlantis are under way, with the launch countdown scheduled to begin on Sunday at 8 a.m.
08.26.06 - The Mission Management Team decided today to postpone the launch of Atlantis for 24 hours. Launch is now scheduled for 4:04 p.m. Eastern time on Monday, Aug. 28.
08.25.06 - Atlantis' payload bay doors were closed for flight last night, and loading of the fuel for the power reactant storage and distribution system is now under way.
08.24.06 - Closeout of Atlantis' aft compartments is complete. Technicians have finished performing the aft confidence test, which involves powering up and testing all of the aft systems.
08.23.06 - Closeout of Atlantis' aft compartments continues, with aft door installation expected later today. Once the doors are installed, workers will begin aft confidence testing.
08.22.06 - Closeout of the orbiter's aft compartments continues, and pressurization of the orbiter's maneuvering system, reaction control system and main propulsion system is under way.
08.21.06 - Following a decision to replace two Ku-band antenna actuator bolts in Atlantis' payload bay, workers spent the weekend successfully performing the bolt replacement.
08.18.06 - Following a decision to replace two Ku-band antenna actuator bolts in Atlantis' payload bay, workers are preparing access platforms and will complete the task over the weekend.
08.16.06 - At Launch Pad 39B, functional tests and checkout of the shuttle and pad systems continue. Hypergolic propellant loading continues and should be complete by Thursday.
08.14.06 - At Launch Pad 39B, functional tests and checkout of the Space Shuttle Atlantis and pad systems are under way. Hypergolic propellant loading continues this week.
08.11.06 - Functional tests and checkout of the shuttle and pad systems are under way. Installation of the elbow camera of Atlantis' remote manipulator system is complete.
08.04.06 - Early Wednesday, Atlantis rolled from high bay 3 in the Vehicle Assembly Building to Launch Pad 39B where the orbiter's auxiliary power units were successfully test fired.
07.28.06 - Atlantis was rolled from processing bay 1 to the Vehicle Assembly Building, where it was lifted into high bay 3 for mating to the external fuel tank and solid rocket boosters.
07.21.06 - In Orbiter Processing Facility bay 1, Atlantis has been placed on a transporter that will be used to transfer the orbiter to the Vehicle Assembly Building on Monday morning.
07.17.06 - After 12 days, 18 hours and 37 minutes of flight, orbiter Discovery safely landed at Kennedy Space Center today with a main landing gear touchdown at 9:14:43 a.m. EDT.
07.14.06 - Today is flight day 11 for mission STS-121. Discovery is docked to the International Space Station and is scheduled to undock from the station early Saturday morning.
07.07.06 - In Orbiter Processing Facility bay 1, workers are busy preparing Atlantis for rollover to the Vehicle Assembly Building, currently scheduled for the last week of July.
06.30.06 - The countdown for the Space Shuttle Discovery launch is in a built-in hold at the 11-hour mark and will pick up again at 10:53 p.m. Launch remains scheduled for Saturday, July 1.
06.29.06 - The countdown for the Space Shuttle Discovery launch began at 5 p.m. Wednesday at the T-43 hour mark. Launch remains scheduled for Saturday, July 1, at 3:49 p.m. EDT.
06.28.06 - The countdown for the Space Shuttle Discovery launch begins at 5 p.m. today at the T-43 hour mark. Launch remains scheduled for Saturday, July 1, at 3:49 p.m. EDT.
06.27.06 - The STS-121 crew arrived at 10 a.m. today at the Shuttle Landing Facility from Johnson Space Center in Houston as final preparations for the launch of Discovery continue.
06.26.06 - Discovery's aft is closed for flight, and the aft confidence test was completed successfully. All aft systems, such as the main propulsion system circuits, were powered up and tested.
06.23.06 - Aft closeouts of Space Shuttle Discovery are nearing completion. Workers are preparing to install the engine compartment access doors. Aft confidence testing will take place today.
06.21.06 - Aft closeouts of Space Shuttle Discovery continue, and payload bay inspections and closeouts are complete. The payload bay doors were closed for flight early Tuesday.
06.19.06 - NASA's Flight Readiness Review was completed Saturday, with managers setting a July 1 launch date for Space Shuttle Discovery on mission STS-121 to the International Space Station.
06.16.06 - Aft closeout work continues on Space Shuttle Discovery, with technicians performing final cleaning, inspections and installation of panels and thermal blankets on the avionics bays.
06.14.06 - The payload bay doors of Space Shuttle Discovery remained closed Monday and Tuesday because of the anticipated high wind and rain from Tropical Storm Alberto.
06.12.06 - The STS-121 crew is scheduled to fly to KSC today in advance of the Terminal Countdown Demonstration Test, which is scheduled for Wednesday and Thursday.
06.09.06 - Work continued at Launch Pad 39B this week to support electrical testing and payload vertical operations on Space Shuttle Discovery for its launch on mission STS-121 in July.
06.07.06 - On Tuesday at the launch pad, Space Shuttle Discovery was powered up for technicians to perform the integrated testing of the multi-purpose logistics module Leonardo.
06.05.06 - Prelaunch loading of hypergolic propellants (monomethyl hydrazine and nitrogen tetroxide) into Shuttle Discovery's forward and aft reaction control systems is complete.
06.02.06 - Discovery was powered up to support the prelaunch loading of hypergolic propellants into the forward and aft reaction control system and the orbital maneuvering system pods.
05.31.06 - Over the holiday weekend, technicians performed no significant processing work at the launch pad. Connections and leak checks of auxiliary power units No. 1, 2 and 3 are complete.
05.26.06 - Technicians continue performing system testing on Space Shuttle Discovery while the vehicle is powered at Launch Pad 39B in preparation for its upcoming launch in July.
05.24.06 - Space Shuttle Discovery remains at Launch Pad 39B, and technicians continue performing system testing while the vehicle is powered in preparation for its upcoming launch in July.
05.22.06 - On May 19, the crawler transporter carrying Space Shuttle Discovery left the Vehicle Assembly Building at 12:45 p.m. on its 4.2-mile journey to Launch Pad 39B.
05.19.06 - The Space Shuttle Discovery arrived at Launch Pad 39B at 8:30 p.m. EDT Friday atop a crawler transporter, a major step toward its launch to the International Space Station.
05.12.06 - Discovery was moved today from Orbiter Processing Facility Bay 3 to the Vehicle Assembly Building, a major step toward a launch to the International Space Station.
05.05.06 - Technicians continue final preparations on Space Shuttle Discovery prior to its move to the Vehicle Assembly Building. The move is scheduled for May 12.
04.28.06 - Technicians continue closing out areas of Discovery before it is moved to the Vehicle Assembly Building. The payload bay doors were closed for the final time prior to flight.
04.14.06 - Technicians continue closing out areas of Space Shuttle Discovery prior to its move to the Vehicle Assembly Building, scheduled for May 12, and then to the pad for its upcoming launch.
04.07.06 - Final area closeouts continue in preparation for Discovery's move to the Vehicle Assembly Building and then to the launch pad for its mission to the International Space Station.
03.31.06 - Final powered-up systems testing and area closeouts continue in preparation for Space Shuttle Discovery's move to the Vehicle Assembly Building no earlier than May 12.
03.24.06 - The seven-member STS-121 crew was at Kennedy on Monday for the station crew equipment interface test as processing on Discovery continues for its launch to the International Space Station.
03.17.06 - Discovery's damaged remote manipulator system (shuttle arm) was removed from the payload bay on Tuesday. The lower section of the arm is en route to Canada today for repair.
03.10.06 - Final closeouts continue on orbiter Discovery in preparation for its rollover from Orbiter Processing Facility bay 3 to the Vehicle Assembly Building.
03.03.06 - On Thursday, Space Shuttle Program management set a launch date of no earlier than May 10 for Discovery's launch to the International Space Station.
02.24.06 - The forward reaction control system was installed on Discovery Monday. The FRCS provides the thrust for attitude maneuvers and for small velocity changes along the orbiter axis.
02.10.06 - Thermal protection system blanket installation continues on the orbiter boom sensor system.
02.03.06 - Solid rocket booster stacking for STS-121 is scheduled to be complete on the right booster in mid-February and the left booster by the end of the month.
01.27.06 - Solid rocket booster stacking for STS-121 is under way. Both the left and right aft boosters were delivered to the Vehicle Assembly Building this week.
01.20.06 - The shuttle arm, or remote manipulator system, was installed on space shuttle Discovery on Monday, Jan. 16. Verification testing on the arm starts next week.
01.06.06 - On Tuesday, Discovery was powered up so technicians could open the payload bay doors and deploy the Ku-band antenna, putting the vehicle back into a processing configuration.