Pearl Harbor is an important symbol of sacrifice in the United States. Lets go visit! Visiting U.S. Symbols: Independence Hall invites young readers to explore the history and significance of this important American symbol.The Visiting U.S. Symbols series introduces important U.S. symbols and their locations, exploring the history and significance of each in language that early readers can understand. Each book includes vibrant photos, glossary word callouts to matching images, and comprehension questions to engage the reader.