STS-51L was the 25th mission of the Space Shuttle program and the final flight of Space Shuttle Challenger. It launched from Kennedy Space Center on the cold morning of January 28, 1986. Seventy-three seconds after liftoff, Challenger broke apart, and all seven crew members were lost.
The crew was Commander Dick Scobee, Pilot Michael Smith, mission specialists Judith Resnik, Ronald McNair, and Ellison Onizuka, and payload specialists Gregory Jarvis and Christa McAuliffe. McAuliffe had been selected as the first teacher in space, and the mission was followed by classrooms across the country, which made the loss especially public and deeply felt.
The accident was traced to the failure of an O-ring seal in one of the solid rocket boosters, which had stiffened in the unusually cold temperatures at launch. The investigation that followed reshaped how NASA managed risk and communicated about safety, and the Shuttle did not fly again for nearly three years.
The spacearchive.ai collection preserves the contemporary record of the mission as part of the historical record of the Space Shuttle program.
A working snapshot of what the collection holds today. The public catalog shows descriptive metadata; full media and transcripts are available through research access.
All records in this collection
Launch coverage of STS-51L begins at T minus 2 hours, 28 minutes, detailing the terminal countdown leading to liftoff at T minus 0 seconds. Key ascent milestones include the roll program and main-engine throttle-down through max Q, then throttle-up. Tragically, the recording captures the vehicle's explosion approximately 73 seconds after launch, marking a significant off-nominal event.
Descriptive summary pending processing.
Descriptive summary pending processing.
Descriptive summary pending processing.
Descriptive summary pending processing.
Descriptive summary pending processing.
Descriptive summary pending processing.
Descriptive summary pending processing.
Descriptive summary pending processing.
Descriptive summary pending processing.
This recording captures the 20th anniversary ceremony honoring the Challenger crew, held at Kennedy Space Center. Notable moments include June Scobee Rodgers laying a wreath at the memorial and sharing her husband's perspective on the risks of space flight. Olivia Guitard honored her late mother with roses, while John Zarrella reflects on the impact of Christa McAuliffe, who would have been the first teacher in space, emphasizing the emotional resonance of the tragedy for many attendees.
Launch coverage of STS-51L at T minus 9 minutes captures the countdown toward a scheduled 9:37 AM liftoff. The recording details a technical hold due to a stripped screw on the hatch handle, which delayed the launch. The crew, including Christa McAuliffe, was ready for the mission, but the launch was ultimately scrubbed due to high winds and weather concerns, with a final window closing at 12:07 PM.
Launch coverage of STS-51L begins at T minus 2 hours, 28 minutes, detailing the countdown to liftoff at T minus 0 seconds. Key ascent milestones include the roll program and main-engine throttle-down through max Q, then throttle-up. Tragically, the recording captures the vehicle's explosion approximately 73 seconds after launch, marking a significant off-nominal event.
Launch coverage of STS-51L begins at T minus 2 minutes, 28 seconds, leading to liftoff at T minus 0 seconds. Key ascent milestones include the roll program and main-engine throttle-down through max Q, then throttle-up. Tragically, the recording captures the vehicle's explosion approximately 73 seconds after launch, marking a significant off-nominal event.
This press conference, held after the STS-51L accident, features Tom Utsman, Deputy Director of Kennedy Space Center, discussing the role of contractors in shuttle processing and quality control measures. Utsman clarifies that self-inspection is limited to non-flight hardware and emphasizes that flight hardware inspections involve both contractor and government oversight. He addresses concerns about the adequacy of Lockheed's performance and the evolution of NASA's quality assurance practices, while refraining from speculating on the accident's causes.
This press conference, held shortly after the STS-51L accident, features Tom Utsman discussing the adequacy of Lockheed's performance and the role of quality assurance personnel. Utsman addresses concerns about potential fatigue among workers, asserting that there was no fatigue factor involved in their work. He also highlights the relationship between NASA and the media, noting frustrations due to the impounding of materials that hindered communication.
This press conference features Dr. Fletcher announcing the planned resumption of shuttle flights on February 18, 1988, and detailing the shuttle manifest for the next 38 months. Admiral Truly discusses the complexities of the manifest, emphasizing the high priority of the Hubble Space Telescope and the need for a balanced approach to accommodate various payloads. The conference also addresses the elimination of commercial and foreign payloads from the original manifest and the challenges of scheduling planetary missions.
This press conference features discussions about the implications of the Challenger accident on NASA's flight schedule and safety protocols. Key topics include the assertion by Congressman Manuel Lujan regarding congressional pressure on NASA, the acknowledgment of an overly ambitious pre-accident flight schedule, and the prioritization of the space station in future missions. Additionally, the speakers clarify that there will be no pressure to increase flight rates inconsistent with safety and reliability.
This recording is a status briefing following the Challenger accident, where Dr. James Fletcher discusses the future direction of NASA's space program. He highlights the debate over adopting a major visionary goal versus managing existing commitments, particularly regarding the space shuttle and space station operations. Fletcher also outlines a long-term initiative for lunar exploration, including the development of a reusable lunar vehicle and plans for establishing a research facility on the moon.
This recording documents the STS-51L salvage operations update, focusing on the identification of Target 292, an external-tank attach segment assessed as most probably from the right SRB, identified at approximately 12:00 EST. Captain Charles Bartholomew and Colonel Edward A. O'Connor discuss the recovery efforts, including the deployment of the NR1 submarine to expedite the identification of over 600 sonar contacts. The update highlights the challenges posed by poor weather conditions and the ongoing analysis of recovered components to understand the failure mechanisms.
This recording captures a post-accident status briefing held about 24 hours after the Challenger accident. Key discussions include the formation of interim teams led by Jesse Moore to gather data and investigate the accident, and Lt. Cmdr. James Simpson's (U.S. Coast Guard) report on the recovery of debris, including a 12-foot piece. Dr. William Graham emphasizes the commitment to understanding the tragedy and ensuring future safety, while addressing concerns about the impact on national security commitments.
This recording is a status briefing presenting NASA's 30-day implementation report (July 1986), in which Dr. James Fletcher discusses NASA's response to the Rogers Commission report. He confirms that NASA has favorably addressed all nine recommendations and outlines a revised timeline for shuttle flights, now projected for early 1988 instead of July 1987. Fletcher emphasizes the importance of safety in the redesign of the solid rocket motor and the need for improved communication within NASA's management structure.
This recording captures the analysis of debris recovery efforts following the STS-51L accident, focusing on the identification of a right-versus-left solid rocket booster chamber-pressure divergence in the seconds before the breakup. It features discussions on the deployment of various recovery assets, including the USS Preserver and the NR1 submarine, as well as the challenges faced in locating debris in the Gulf Stream. Notably, the recording highlights the retrieval of critical components, including the inertial upper stage computer, during the early salvage operations.
JSC (MS) - Teacher Training: STS 51-L Crew Portrait Session and McAuliffe, Morgan and Resnik Habitation Procedures
JSC — STS-51L mission specialists Ellison Onizuka and Ronald McNair conduct contingency EVA training in the Weightless Environment Training Facility (WETF).
JSC (MS) - STS 51-L Crew at Burke Baker Planetarium with Carolyn Sumners Giving Briefing on Star Views; Scobee, Smith, Resnik, Onizuka, McNair, Jarvis, and McAuliffe
STS 51-L Ice and Shuttle, 1/28/86
President Ronald Reagan's Speech on Space Shuttle Challenger
JSC - STS 51-L Memorial Service at JSC
President Ronald Reagan's Remarks at The Memorial Service for the Space Shuttle Challenger Crew, Johnson Space Center, Houston, Texas
Trip to Texas. Cuts of arrival via Air Force One at Ellington Field and a Memorial Service for the Challenger Crew at Johnson Space Center, Houston
Announcement of the Presidential Commission on the Explosion of the Space Shuttle Challenger in the Roosevelt Room
STS-51-L SALVAGE BRIEFING, 2/19/86 — UNEDITED VIDEO REPORT: Press briefing, moderated by Hugh Harris, National Aeronautics and Space Administration (SA) spokesperson at Kennedy Space Center (KSC). USAF Col. Edward O'Connor, Director, Search,Recovery,and Reconstruction Task Force; and USN Capt. Charles A. Bartholomew,United States Navy Supervisor of Salvage, Naval Sea Systems Command give briefing and answer reporters' questions on location and size of search area;show video of the search area and shuttle parts involved in the recovery operation.
UTSMAN, SIECK, CONWAY PRESS BRIEFING, 2/28/86 (35:29 min); STS-51-L UNDERWATER DRONE (6:00 min); STS-51-L EXTERNAL TANK (6:46 min)
JSC (MS) - STS 51-L Crew Portrait, Scobee, Smith, and Resnik
President Ronald Reagan's Remarks on Receiving the Final Report of the Presidential Commission (Rogers Commission) on the Space Shuttle Challenger Accident in Rose Garden
President Ronald Reagan's Photo Opportunities from the Oval Office, Cabinet Room and Rose Garden on June 9-10, 1986. President Reagan Meeting with King Hussein of Jordan in the Oval Office on June 9, 1986. President Reagan Meeting with King Hussein of Jordan in the Cabinet Room on June 9, 1986. President Reagan Receives Report from the Rogers Commission (Challenger Shuttle Disaster) in the Cabinet Room on June 9, 1986. President Reagan's Remarks to the Rogers Commission (Challenger Shuttle Disaster) in the Rose Garden on June 9, 1986. President Reagan Meeting with Radio Marti in the Cabinet Room on June 9, 1986. President Reagan Meeting with Dick Howser of the Kansas City Royals and his family in the Oval Office
President Ronald Reagan's Remarks to Employees of the National Aeronautics and Space Administration on the First Anniversary of the Explosion of the Space Shuttle Challenger from the Oval Office
President Ronald Reagan's Remarks on the Challenger Explosion to Network Anchors and Questions from Reporters from the Roosevelt Room — This item is a video recording of President Ronald Reagan’s remarks on Challenger explosion to network anchors and questions from reporters. On this day, President Reagan had planned to meet with news anchors to discuss the State of the Union Address. Instead, President Reagan, Leslie Stahl, Charles Bierbauer, and Chris Wallace discussed the Challenger disaster.
Rogers Commission chairman William P. Rogers and vice chairman Neil Armstrong testify before the House Committee on Science and Technology on the Commission's report on the STS-51L (Challenger) accident. They identify the solid rocket motor field-joint O-ring failure as the cause, describe how Thiokol reversed its no-launch recommendation under Marshall/NASA pressure 'to accommodate a major customer,' and explain that launch-constraint and O-ring history failed to reach senior decision-makers. Discussion covers the impossibility of crew escape in this accident, a recommended dedicated safety office, budget/schedule pressures, whether criminal prosecution was warranted (Rogers said he found no evidence of gross negligence or a basis for prosecution), and the program's future.
NASA Administrator James C. Fletcher, Associate Administrator Rear Admiral Richard Truly, deputy administrator William Graham, program manager Arnold Aldrich, and astronaut Robert Crippen respond to the Rogers Commission's nine recommendations: the solid rocket motor joint redesign team with NRC independent oversight, review of every criticality-1/1R item (all Criticality 1/1R waivers revoked for re-review and revalidation), a management/communications review led by Crippen, safety-office and landing-safety actions, a crew-escape study, flight-rate/mixed-fleet plans, and a July 1987 return-to-flight target 'if it is safe.' The NASA photo/TV team narrates the launch film — smoke puffs at ignition, a flame plume near 58 seconds, LH2 tank failure ~73 seconds, then structural breakup. Members press on spec compliance, quality-assurance staffing cuts, information flow, and the 'silent safety program.'
Primary references for STS-51L. spacearchive.ai is an independent archive and is not affiliated with NASA.
Request access to full media and timestamped transcripts, or ask our team to help you locate a specific moment from this mission.