This is an excerpt from 'The Real Reasons We Explore Space'.
Step-by-step explanation:
Author's Claim
Griffin believes that NASA and Space exploration is very important to the American people and their identity.
Reasons
Most of us want to be both as individuals and societies. The second reason is curiosity. Finally we have built monuments since the earliest civilization. We have to leave something to show the next generation to show what we have done.
Griffin gives two types of reasons, Real Reason and Acceptable Reason.