© 2021 WFAE
90.7 Charlotte 93.7 Southern Pines 90.3 Hickory 106.1 Laurinburg
Play Live Radio
Next Up:
0:00
0:00
Available On Air Stations

Space Shuttle Structure

NASA engineers and safety experts have continuously modified and upgraded the shuttle fleet over the years. The fleet has known weaknesses, and investigators will be looking very closely at these as they try to figure out what happened to Columbia as it re-entered Earth's atmosphere Feb. 1. NPR's Chris Joyce reports.

Copyright 2003 NPR