Answer:
so ur just gonna bring me a birthday gift on my birthday to my birthday party on my birthday with a birthday gift?
Explanation:
The answer to your question is,
Two. The twin towers both collapsed.
-Mabel <3
Hey there!
Airplanes must be pressurized when flying at high altitudes so that the oxygen levels stay normal for us to breathe. The higher you go up, the thinner the air gets, which causes breathing problems for us humans.
Thank you!
