Imagine living in a house with very thin walls. Outside, there's no air to breathe.

Now imagine there's a hole in the wall and air is escaping. You can't fix it. This is very scary.

This is what's happening on the International Space Station.

Recently, astronauts were told to go to a safe place because of a leak.

News about the leak made people worried. Headlines said astronauts might have to leave the station.

The word 'evacuation' is frightening. But NASA didn't seem too worried.

NASA told astronauts to go to a safe place and be ready to leave if needed.

What happens when there's a leak on the space station?

Astronauts don't panic. They just follow instructions.

Maybe they're not too worried because the leak has been there for years.

Astronauts were told to shelter because cosmonauts were trying to fix the leak again.

The part of the station with the leak has been a problem for a while.

The first part of the station was launched in 1998. People have been living there since 2000.

The station was supposed to last 15 years, but it's still working.

Just because it's old doesn't mean it's not useful anymore.

A report said NASA is worried about the station's safety because of the leaks.

NASA and its partners are working to fix the cracks, but they're not sure why they're happening.

The station is in a very harsh environment.

It goes around the Earth every 90 minutes, which causes wear and tear.

To deal with the leak, astronauts close off the area and lower the air pressure.

The docking and undocking of spacecraft might be causing the cracks.

When spacecraft dock or undock, it puts stress on the station.

Meet Joshua Kutryk, an astronaut who will go to the space station.

Despite its age, the station will keep working until 2030. Then, NASA wants a new one.

NASA stopped the evacuation alert for the space station.

Three Americans and one Italian will be part of a new mission.

NASA thinks the station is safe, but they have plans in case of an emergency.

The station is still doing its job. It has had some problems, but it's still working.

NASA and its partners are watching the leak closely.

An expert thinks 2030 is a reasonable time to replace the station.

He thinks NASA is doing well if this is the biggest problem they have.

This is good news for astronaut Joshua Kutryk, who will go to the station soon.