Answer:
Structural unemployment.
Step-by-step explanation:
As the exercise exemplifies, the decrease in the number of jobs for aerospace engineers after the success of the Apollo program resulted in structural unemployment. This type of unemployment refers to a mismatch between jobs available and the skill levels of the unemployed. Like the exercise explains, qualified aerospace engineers have an "overqualification" for many jobs, making them a part of this unemployment that causes certain groups to have difficulties finding a job.