Sentence:  After all , the average American as he lies and waits for the enemy in Korea or as she scans the newspaper in some vain hope of personal contact with the front is unconcerned that his or her plight is the result of a complex of personal , economic and governmental actions far beyond the normal citizen 's <WSD>comprehension</WSD> and control . 
Meaning of the word marked with <WSD> tags:  an ability to understand the meaning or importance of something (or the knowledge acquired as a result)