Dr. Jonathan Clark, a former NASA flight surgeon whose astronaut wife, Laurel, died aboard Columbia, praised NASA's leadership for releasing the report "even though it says, in some ways, you guys didn't do a great job.
"I guess the thing I'm surprised about, if anything, is that (the report) actually got out," said Clark, who was a member of the team that wrote it. "There were so many forces" that didn't want to produce the report because it would again put the astronauts' families in the media spotlight.
Some of the recommendations already are being applied to the next-generation spaceship being designed to take astronauts to the moon and Mars, said Clark, who now works for the National Space Biomedical Research Institute at Baylor College of Medicine in Houston.
Kirstie McCool Chadwick, sister of pilot William McCool, said a copy of the report arrived at her Florida home by FedEx Tuesday morning but that she had not read it.
"We've moved on," Chadwick said. "I'll read it. But it's private. It's our business ... Our family has moved on from the accident and we don't want to reopen wounds.
Correspondent Mike Schneider in Orlando, contributed to this report.