1. TRUTH, LIES AND O-RINGS: INSIDE THE SPACE SHUTTLE CHALLENGER DISASTER Presented by : Allan J. McDonald Aerospace Consultant & Author ATK Thiokol (Retired) Former Director Space Shuttle SRM Project :

2. TWO LOST SPACE SHUTTLES STS-51L Challenger Launch: January 28, 1986 Time: 16:38 GMT STS-107 Columbia Launch: January 16, 2003 Time: 15:39 GMT

3. PRE-LAUNCH ICE ON PAD

4. FIRST EVIDENCE OF JOINT LEAK Leak at T + 0.678 Seconds LIFTOFF

5. JOINT LEAK REOPENS IN FLIGHT Joint Leak Restarts T + 59 Seconds Joint Plume Visible T + 60 Seconds MAXIMUM DYNAMIC PRESSURE AND WIND SHEAR

6. T PLUS 78 SECONDS: DEBRIS Orbiter Wing SSME Pod Crew Cabin Recovered RH SRB Aft Field Joint

9. COLUMBIA ACCIDENT & VERIFICATION February 1, 2003 Approx. 9:00 a.m. EST Columbia Debris During Re-entry Bi-Pod Ramp Foam Impact Test on RCC

10. STS-51L AND STS-107 CREW Lest We Forget!