Fellow astronaut Jim Lovell suggested they use an eagle, the national bird of the United States, as the focus of the patch. Running with that proposal, Michael Collins found a picture of an eagle in a book about birds and traced it. He then sketched in a field of craters beneath the eagle's claws and the earth behind its wings.
The crew felt the patch didn't quite tell the right story. Tom Wilson, the Apollo 11 simulator instructor, suggested they add an olive branch as a symbol of the peaceful expedition. The crew was delighted with that notion and Collins quickly modified the sketch to have the eagle carrying the olive branch in its beak.
After making a few detail-oriented decisions, the patch was submitted for approval. However, the initial patch design was rejected. Bob Gilruth, the director of the then-named Manned Spacecraft Center, saw the eagle landing with its talons extended as too hostile and warlike. So, the olive branch was transferred from the eagle's mouth to his talons and the patch design was complete.
How does the last paragraph contribute to the development of ideas in the passage?
It clarifies the idea that the purpose of the space program is to advance science, not develop weapons.
It reiterates that the Apollo 11 lunar landing is one of the most recognized NASA missions in history.
It introduces the idea that professional artists should design the patches, not the crew members.
It implies that the crew wanted to use the eagle because they all came from military backgrounds.