PPE: Respirator Usage and Safety. A respirator is a personal protective device that is worn on the face. It covers the nose and mouth and is specifically designed to provide respiratory protection by forming a tight seal against the wearerâs skin. Respirators vary in their level of protection and efficiency to filter out airborne particles.
In 2003, Columbia disintegrated over Texas while returning from a 16-day trip to space. Later analysis found that a small bit of foam insulation that broke off an external fuel tank during launch had torn a hole in the orbiter's wing and led to the disaster. Gene Grush recounts the events from NASA's perspective.
Unlike many other settlements that disappeared due to fire, vandalism and time, Columbia survived. It was never completely deserted. In 1945 the State Legislature made the site a State Historic Park in order to preserve a typical Gold Rush town, an example of one of the most colorful eras in American history.