Few people understand the state of our national security as well as Janet Napolitano and Joe Biden. Napolitano, former Dept. of Homeland Security Secretary and the first appointed by President Obama, has written about the subject in her new book,"How Safe Are We?" She spoke with Vice President Joe Biden, who—in addition to being Barack Obama's Vice President— chaired the Senate Foreign Relations Committee and sat on the Senate Judiciary Subcommittee on Terrorism, Technology and Homeland Security. "Homeland security is not only the job of the secretary or of the 240,000 professionals who work for the department," says Napolitano, "it is everyone's responsibility."