HELP PLZ :))) why does mr. harrison knock the sign of the colored bathroom (Hidden figure Movie)

the "whites only" bathroom issue in his building

Explanation:

9/11 is where these terrorist groups were hijacking these planes and trying to send them to places like the white house and the pentagon. I think it was a terrible thing that happened in the history of United States. People does very bad things but that's no excuse for what they did. I think somebody was mad at the government or they just wanted to cause a lot of people pain.

Explanation:

hope this helps