An excerpt:

“There’s always some chance you’ll have a failure in that first 30 seconds to a minute, where it would be close enough to the ground where you’ll see debris fall. I think it’s a very small chance—and this is what the FAA will quantify—maybe less likely than being hit by lightning. But the chance isn’t zero. What if a rocket blows up and it lands in a wildlife refuge or over someone’s house?” asks Mariel Borowitz, a space policy expert at Georgia Tech.