Firing squad witness describes South Carolina execution of Brad Sigmon: "My heart started pounding"

I've now watched through glass and bars as 11 men were put to death at a South Carolina prison. None of the previous 10 prepared me for watching the firing squad death of Brad Sigmon on Friday night.

I might now be unique among U.S. reporters: I've witnessed three different methods - nine lethal injections and an electric chair execution. I can still hear the thunk of the breaker falling 21 years later.

As a journalist you want to ready yourself for an assignment. You research a case. You read about the subject.