25 years ago, a NASA astronaut witnessed the tragic 9/11 attacks from space. Here's what he saw.

The aftermath of the 9/11 attacks on the World Trace Center in New York City, as seen by the astronauts onboard the International Space Station on Sept. 11, 2001. . When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: NASA Frank Culbertson had a birds-eye view of one of the most memorable and tragic events in American history. The NASA astronaut was the only American off of Earth on Sept. 11, 2001. He was circling the planet aboard the In…