This morning, self-driving cars under intense scrutiny after police say an Uber using the technology hit and killed a woman in Tempe, Arizona.

That is a clip from Good Morning America from March of last year, the death of Elaine Hartsburg, the

Arizona woman who became the first person to be killed by an autonomous vehicle.

If you remember this story at all, it's because it was seen as a watershed moment for

self-driving car technology.

The coverage that followed was all about Uber, and companies like it, which are trying

to bring robots to American roads.

Police are still figuring out who was at fault, but there are serious questions now,

because this was part of Uber's pilot program to see whether this works at all.

But what about the other side of that accident?

What about people like Elaine Hertzberg who are killed while walking?

Their deaths don't usually even make the papers, let alone warrant a segment on the national news,

because they don't involve a buzzy new technology.

But an epidemic is underway.

The pedestrian death toll is up by 50% in the past decade.

6,200 people every year are killed on foot in the United States.

It's an astonishing number.

Multiply the number of U.S. military who have died during the 18-year war in Afghanistan

by two and a half.

That's how many pedestrians are killed walking in the United States every single year.

So now that you're right to the States every single year.

So now that you're writing this book, do you just do you walk around thinking about the potential impact value of various cars that surround you in the same way that someone

...