What is the initial problem with cascade aerodynamics and what stops the concerns

The initial problem, the people with Cascade aerodynamics had is because they were summoned to work with the African-Americans who were assigned to work in the unit of West Computers.

This concern was solved when they saw the qualities of the workers especially their good manners and knowledge.

Explanation

This incident is taken from the book of Margot Lee Shetterly named 'Hidden Figures'.

This is a true story of three African-American women who worked at Langley Memorial Research Center in Virginia whose works were unrecognized for decades in the aeronautical industry.