Thunderstorms are a staple of the summertime across the Lower 48, and they all produce lightning — a wild phenomenon that also can be dangerous. In D.C. on Thursday, two people died after being hospitalized with injuries sustained in an apparent lightning strike near the White House. These bolts of raw electricity ricochet through thin air, arcing from stormy skies and blasting whatever they hit with a deafening roar. Lightning can be mesmerizing, dangerous, beautiful and terrifying, but how muc