1. STS-93 Landing
The Space Shuttle orbiter Columbia, with its drag chute landed, touches down on runway 33 at the Shuttle Landing Facility after a successful mission of nearly five days and 1.8 million miles. Main gear touchdown was at 11:20:35 p.m. EDT on July 27.
(Photo: NASA)

2. STS-93 Landing
The Space Shuttle orbiter Columbia swoops out of the darkness onto runway 33 at the Shuttle Landing Facility after a successful mission of nearly five days and 1.8 million miles. Main gear touchdown was at 11:20:35 p.m. EDT on July 27.
(Photo: NASA)

3. STS-93 Landing
A Johnson Space Center photographer recorded the fly-over of Space Shuttle Columbia for STS-93 above the Johnson Space Center's Rocket Park. The Saturn V is below the streak left by Shuttle Columbia re-entering the atmosphere.
(Photo: NASA)

4. STS-93 Landing
Following the landing of Space Shuttle Columbia on July 27, 1999, this close-up view shows what appear to be three small holes in the liquid hydrogen tubes inside the nozzle on main engine No. 3. Engineers will examine the engine to determine if a possible hydrogen leak occurred during the STS-93 launch on July 23.
(Photo: NASA)

5. STS-93 Landing
Following the landing of Space Shuttle Columbia on July 27, 1999, this close-up view shows what appear to be three small holes in the liquid hydrogen tubes inside the nozzle on main engine No. 3. Engineers will examine the engine to determine if a possible hydrogen leak occurred during the STS-93 launch on July 23.
(Photo: NASA)

6. STS-93 Landing
Following the landing of Space Shuttle Columbia on July 27, 1999, this close-up view shows what appear to be three small holes in the liquid hydrogen tubes inside the nozzle on main engine No. 3. Engineers will examine the engine to determine if a possible hydrogen leak occurred during the STS-93 launch on July 23.
(Photo: NASA)

7. STS-93 Landing
This photo shows the punctures in the coolant tubes in the right main engine of Columbia which caused a small hydrogen leak during the Shuttle's climb to orbit on July 23.
(Photo: NASA)

8. STS-93 Landing
This photo shows the punctures in the coolant tubes in the right main engine of Columbia which caused a small hydrogen leak during the Shuttle's climb to orbit on July 23.
(Photo: NASA)

9. STS-93 Landing
This close up view shows the denting and rupturing of the three coolant tubes in the nozzle of Columbia's right main engine, likely caused by foreign object deb ris during the Shuttle's launch July 23.
(Photo: NASA)

10. STS-93 Landing
This close up view shows the denting and rupturing of the three coolant tubes in the nozzle of Columbia's right main engine, likely caused by foreign object deb ris during the Shuttle's launch July 23.
(Photo: NASA)

11. STS-93 Landing
This close up view shows the denting and rupturing of the three coolant tubes in the nozzle of Columbia's right main engine, likely caused by foreign object deb ris during the Shuttle's launch July 23.
(Photo: NASA)