The electromagnetic pulse (EMP) threat to the United States is existential and growing. EMPs can occur with a nuclear explosion in space, cyberattacks, terrorist attacks, physical threats or a large coronal mass ejection from the sun, all of which are described in this book. Any of these EMPs could wipe out not only our electric grid, but anything with a computer chip in it, sending the U.S. back to the 1850s. Within a year after grid failure, the EMP Commission tells us that 9 out of 10 Americans will succumb to dehydration, starvation, gang and other violence, murder, suicide, breakdown of society and diseases. The government needs to take action now by forming an EMP Manhattan Project that focuses on hardening our electric grid. If it doesn't, those who survive will be existing in a country unrecognizable.