Why Is the Shuttle Debris Dangerous?

Feb. 1 -- The space shuttle Columbia tragedy produced fallen debris in and around the Dallas area, and along the Texas-Louisiana border. Here are some questions and answers about the shuttle debris.

Why are authorities warning people to stay away from any fallen shuttle debris?

A: There are many reasons why people should avoid approaching, touching, or moving any debris related to the Columbia disaster.

At the most basic level, officials will need to catalog where and what pieces of the destroyed shuttle were discovered as part of the investigation that is under way. Moving or taking pieces will hinder the investigation and may be considered by authorities as criminally tampering with evidence.

Also, the shuttle has on-board rockets to thrust and maneuver while in orbit. The debris — especially sections near these chemical rockets — may be coated with residue which is highly toxic and dangerous to handle without the proper protective gear.

And since the astronauts were conducting scientific experiments onboard while in space, there may be other chemicals or trace elements which may also have become hazardous after exposure to the intense heat and pressure of the accident.

What should I do if I find what I think is a part of the shuttle?

A: Don't touch or move any fragment.

Call 911 and alert authorities that you believe you may have discovered a debris field.

Keep a safe distance away from the area and warn others to keep clear until fire and police units arrive on scene.

Should I be concerned about toxic fumes?

A: If the debris is smoking or smoldering, don't panic.

Maintain a safe distance away from and upwind of the debris field.

Alert 911 or emergency response authorities that the fire department may be needed at the scene.