"A sickening feeling in the pit of my stomach because we had lost the landing," Apollo 13 Fred Haise said in Huntsville, Ala. Thursday. Haise was describing the moment he realized his crew's mission to the moon had been ended by an explosion on their spacecraft.

Haise and fellow astronauts James Lovell and John Swigert were 200,000 miles from Earth heading for the moon in April of 1970 when an oxygen tank exploded on board their combined command module and lunar lander. The command module's normal supply of water, light and electricity was gone. "Houston, we've had a problem," Swigert told Mission Control in a famous line from America's space history.

Apollo 13 Astronaut Fred Haise Live at #NASAMarshall We're live with a true American hero, retired NASA astronaut Fred Haise! Haise was a member of Apollo 13. He is visiting #NASAMarshall today for Safety Week, and today's theme is "Learning." Earlier today Haise spoke with #NASAMarshall team members about his experiences in space and embracing all the ways in which we absorb and apply the personal and professional lessons we learn. Join us for this Facebook Live, and ask any questions you have for Haise in the comments below! Posted by NASA's Marshall Space Flight Center on Thursday, September 28, 2017

Speaking on video to NASA historian Brian Odom at the Marshall Space Flight Center Thursday, Haise described what happened next. He also talked about what it's like to ride a Saturn V off the launch pad and what it will take to get to Mars. The video has already been watched 80,000 times.

"The best thing was we got back," Haise said of the mission that was also rated a success by NASA for all the lessons learned about survival in space. Read the NASA account of the mission here.

Haise was at Marshall for an internal Safety Week meeting with NASA and contractor employees.

(Updated Sept. 28 at 6:40 to correct the date of the mission)