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Space Shuttle Columbia Nose Cone Found

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  • Space Shuttle Columbia Nose Cone Found

    HEMPHILL, Texas (Feb. 4) - Investigators have made an important discovery in their hunt for rubble from space shuttle Columbia, locating the spacecraft's nose cone in a heavily wooded area of eastern Texas.

    A crew was to return to the site Tuesday to excavate the cone, which was found partially buried in a hole described by state troopers as 20 feet wide.

    ''It's basically the front of the nose cone,'' said Warren Zehner, an Environmental Protection Agency senior on-scene coordinator. ''It's reasonably intact.''

    The nose cone represents one of the biggest findings to date. Although the search for debris has turned up thousands of tiny shuttle pieces, the cone is one of the largest and most recognizable parts and could potentially provide insight into how the shuttle disintegrated over Texas on Saturday, killing all seven astronauts aboard.

    The shattered shuttle was effectively being reconstructed from an area larger than West Virginia. That includes the massive Toledo Bend Reservoir on the Texas-Louisiana state line, where divers using sonar equipment are searching for what authorities believe is a car-size chunk.

    Some 12,000 pieces of debris had been collected in the region by late Monday afternoon. Although the search was grisly at times, with human remains reportedly found at 15 locations in Nacogdoches County alone, law officers were satisfied with the results.

    ''It was a very, very good day,'' Billy Smith, emergency management coordinator for three Texas counties, said Monday. ''This was probably one of the best days we've had.''

    The cone was found a few miles from Hemphill, a town of about 1,200 people that has become a focus of the search. Hemphill is 130 miles northeast of Houston and Johnson Space Center.

    State troopers near the site were stationed at a roadway to keep media and others from the area. Embedded in a tree near the nose cone was what appeared to be a black tile.

    About 10 searchers emerged from the woods with bags full of debris, including metal objects. They filled a bed of a pickup truck with shuttle fragments.

    The EPA, which is overseeing debris collection, has been using an airplane equipped with infrared sensors that can spot fragments that might be tainted with hazardous chemicals.

    Using pushpins to mark debris sites, an independent investigative team headed by retired Adm. Harold W. Gehman Jr. and NASA examiners have set up a command post at Louisiana's Barksdale Air Force Base, where some body parts and shuttle fragments were being collected.

    NASA shuttle program manager Ron Dittemore said NASA was particularly interested in any pieces that may have fallen from Columbia as far west as New Mexico, Arizona or California. The FBI was checking reports of possible debris in Arizona.

    ''It's like looking for a needle in a haystack,'' Dittemore said, referring to tracking bits of the 6-by-6 inch thermal tiles that covered Columbia. ''But that is not going to keep us from looking for it.''

    The recovery effort is daunting due to the size and scope of the debris field. It stretched west to east 380 miles from Eastland, Texas, to Alexandria, La., and north-south 230 miles from Sulphur Springs, Texas, to metropolitan Houston.

    Louisiana state police confirmed more than two dozen chunks of debris in 11 different parishes. Authorities recovered a 3-by-4-foot metal panel with small holes from a thicket in Sabine Parish, on the Texas border. Vernon Parish chief deputy Calvin Turner said four chunks of metal were found in the parish

    ''We'll be finding stuff months down the road. I'd say hunting season is when people will be picking stuff up, or we'll never find it at all,'' Turner said.

    Milton Breaux, a house painter from Scott, La., said he and a friend were fishing in a boat at 8 a.m. Saturday morning on the Toledo Bend Reservoir when they heard something hitting the water. He said he heard six to 10 splashes in three or four minutes.

    ''It made kind of a singing or sizzling sound when it was coming down,'' he said. ''What I guess were the smaller things made a sound like a rifle firing when they hit the water. The bigger ones sounded more like a shotgun blast hitting.''

  • #2
    SPACE CENTER, Houston (Feb. 4) - NASA engineers are taking a second, harder look at video, computer data and everything else that led them to conclude - perhaps wrongly - that a flyaway chunk of insulation did not harm space shuttle Columbia during liftoff.

    ''We are completely redoing the analysis from scratch,'' shuttle program manager Ron Dittemore said Monday, exactly one week after engineers assured him that any damage to the shuttle's thermal tiles was minimal. ''We want to know if we made any erroneous assumptions. We want to know if we weren't conservative enough. We want to know if we made any mistakes.''

    The wrenching duplication of work to determine what doomed the shuttle Saturday morning, killing its seven crewmembers, was to be temporarily halted Tuesday so employees could take part in a memorial service at Johnson Space Center with President Bush.

    Practically from the start, investigators have zeroed in on a piece of foam insulation that fell off the shuttle's big external fuel tank during liftoff Jan. 16. The impact by the 2 1/2-pound, 20-inch fragment may have damaged the heat tiles that keep the ship from burning up during re-entry into the atmosphere.

    ''We're making the assumption from the start that the external tank was the root cause of the problem that lost Columbia,'' Dittemore said. ''That's a fairly drastic assumption and it's sobering.''

    While Columbia was still in orbit, NASA engineers analyzed launch footage frame-by-frame and were unable to determine for certain whether the shuttle was damaged by the insulation. But they ran computer analyses for different scenarios and different assumptions about the weight of the foam, its speed, and where under the left wing it might have hit, even looking at the possibility of tiles missing over an area of about 7 inches by 30 inches, NASA said.

    The half-page engineering report - issued on Day 12 of the 16-day flight - indicated ''the potential for a large damage area to the tile.'' But the analyses showed ''no burn-through and no safety-of-flight issue,'' the report concluded.

    High-level officials at NASA said they agreed at the time with the engineers' assessment.

    ''We were in complete concurrence,'' Michael Kostelnik, a NASA spaceflight office deputy, said at a news conference Monday with NASA's top spaceflight official, William Readdy.

    ''The best and brightest engineers we have who helped design and build this system looked carefully at all the analysis and the information we had at this time, and made a determination this was not a safety-of-flight issue.''

    No one on the team, to Dittemore's knowledge, had any reservations about the conclusions and no one reported any concerns to a NASA hot line set up for just such occasions.

    ''Now I am aware, here two days later, that there have been some reservations expressed by certain individuals and it goes back in time,'' Dittemore said. ''So we're reviewing those reservations again as part of our data base. They weren't part of our playbook at the time because they didn't surface. They didn't come forward.''

    The Columbia sustained significant tile damage in 1997, after NASA stopped using the coolant Freon in production of foam that coats the external fuel tank, a NASA engineer said at the time. The change was made because of the potential environmental damage Freon can cause.

    In his December 1997 report, Greg Katnik, a mechanical systems engineer at Kennedy Space Center, raised the possibility that the new foam may have had some unknown characteristics that were not compatible with the severe conditions of takeoff.

    Kalpana Chawla, one of the seven astronauts killed Saturday, was on the 1997 Columbia mission.

    The Marshall Space Flight Center later concluded that the absence of Freon led to the detachment of the foam, The New York Times reported Tuesday. The formulation was later improved, the Times said.

    On Monday, Readdy said the damage done by the broken-off piece of insulation is now being looked at very carefully as a possible cause of the tragedy. ''It may certainly be the leading candidate right now - we have to go through all the evidence and then rule things out very methodically in order to arrive at the cause,'' he said.

    Monday night, searchers found the front of the shuttle's nose cone buried deep in the ground near the Louisiana line. But even more valuable in trying to piece together what happened would be to locate any tiles from Columbia's left wing.

    ''That's the missing link that we're trying to find,'' Dittemore said.

    The shuttle, covered with more than 20,000 thermal tiles, broke up 39 miles over Texas and fell to Earth just as it was experiencing maximum re-entry heat of 3,000 degrees.

    NASA said temperature data showed that the shuttle's left side - the same side hit by the debris - heated up sharply just before Columbia disintegrated.

    The foam that covers the shuttle's 154-foot external fuel tank is hard enough to damage the shuttle when the spaceship is hurtling into space at high speed.

    Dittemore said he knows of at least two other shuttle launches in which foam came off and damaged the shuttle, though nowhere near to the extent suspected in the case of Columbia's last launch. One of the flights - Columbia, in 1992 - had tile damage on the wing. The other happened on Atlantis' mission in October, when a piece of foam struck the bottom of one of the two booster rockets.

    Engineers relied heavily on the fact that the previous damage was so minor.

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