"A solar flare that could wipe out the communications and electrical grids while frying a wide variety of electronics, quickly sending us back to the 19th Century."
Yes, you are correct Mr.Reynolds.
"The disruption would kill a lot of people -- some quickly, as medical devices failed, others later as food supplies and clean water became scarce. Without electricity, pretty much everything in our civilization comes to a stop. The economic damage would be incalculable."
You are correct again Mr.Reynolds.
Space is big, and the Earth is small, so most of these will miss us. But the consequences of being hit are serious. And there's also the possibility that an enemy nation might detonate a nuclear weapon at high altitude over the United States, generating a similar effect via the nuclear Electromagnetic Pulse (EMP).