The year 2020 has featured an array of safety and security concerns for ordinary Americans, including disease and natural disasters. How can the U.S. government best protect its citizens? That is the focus of a new scholarly book with practical aims, “Beyond 9/11: Homeland Security for the Twenty-First Century,” published by the MIT Press. The volume features chapters written by 19 security experts, and closely examines the role of the Department of Homeland Security (DHS), which was created after the September 2001 terrorist attacks on the U.S. The book is…