In Hidden Figures, There is a scene where Paul Stafford stops Katherine Johnson from entering into the meeting.
Paul Stafford: There is no protocol for women attending.
Katherine Johnson: There's no protocol for a man circling the Earth either, sir.
Later, she is allowed by Alan into the meeting.
There is another scene where we can see control room filled with only men:
Later Alan welcomes Katherine into the Friendship 7 Control Room.
Why is there is a restriction for women in NASA?