I think that the idea emphasized in both speeches is that hard work breeds both satisfaction and dignity. From Pres. Obama's speech, he implied that Americans tend to feel successful when they are satisfied with their jobs. On the other hand, Pres. Roosevelt, it is from work that Americans derive security.
They didn't think about them at all according to the text
I believe it is D/ past participle.
Explanation:
The plane was able to take off once the runway was clear
I believe it’s a coordinating junction