"???? you ever wondered why people are asked to take off their shoes and have their bags scanned before they board an airplane? Airport security uses high-tech equipment and procedures created by the Department of Homeland Security to make sure that everyone stays safe. This highly-engaging book uses the latest information to explain how the DHS helps during disaster, protects the country's computer systems, and keeps America secure. Students can use this book to delineate and evaluate the argument and specific claims in a text, assess whether the reasoning is sound and the evidence is relevant and sufficient, recognize when irrelevant evidence is introduced, and use timelines and captions to build their visual literacy skills."--