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During the Revolutionary War, a young boy volunteers for a dangerous misson. Betsy Ross has finished a new flag for General Washington. The flag might help to rally the freezing soldiers camped with Washington in Valley Forge. But British troops are everywhere and anyone trying to deliver the flag may be captured and shot as a spy. Could a boy make the journey without getting caught? Ben sets out in a blinding snow storm in an effort to bring the flag, and new hope, to Valley Forge.

This revised edition provides exciting new information and spectacular photographs. Updates include the International Space Station, the new category of dwarf planets, and how astronauts live in space.