Satawal is one half mile long by one mile wide.

And today, you would see this inside the mine, half a mile underground.

The average depth at the top of it is about a mile and a half.

So that's all water under the sea a mile and a half, two miles, three miles down.

The fact is, the last mile is the problem, and half the world now lives in dense cities.

The calving face is four and a half miles across, and in this shot, as we pull back, you're only seeing about a mile and a half.

The Highline is an old, elevated rail line that runs for a mile and a half right through Manhattan.

A mile and a half from the surface to two miles to three miles no sun has ever gotten down here.

And if you're in the half mile radius of where this bomb went off, you have a 90 percent chance of not making it.

A 12 year old boy runs past sugar cane fields on a half mile journey to the nearest television set in order to watch the game

A key part of their technical set up was a half mile long length of wire, which was thrown across the rooftops of several houses in Boston.

A small asteroid, say a half mile wide, would touch off firestorms followed by severe global cooling from the debris kicked up Carl Sagan's nuclear winter thing.

It's about three miles out of Nairobi, and it's a mile long and about two tenths of a mile wide, where over half a million people live crammed in these little tin shacks, generation after generation, renting them, often eight or 10 people to a room.

They go from eight cents a mile in 2010, to four cents a mile in 2015, to two cents a mile by 2020.

Maybe the last mile problem really should be thought of as the last mile opportunity.

This is the last mile.

That's a 2,000 mile journey.

I walked about 1 mile.

So we got out and walked, and sure enough, about half a mile, we came over the crest of this hill, and there was a huge gathering of Bedouin with their camels.

The last mile is, everywhere, problematic.

Yeah, I'm a million mile flyer.

This river is one mile across.

So in a sense this is an absolute zero carbon, zero fossil fuel electric mile at two cents a mile by 2020.

I walked three fourths of a mile.

The shopping center is one mile ahead.

So, how do we tackle the last mile?

I mean, and only one mile is visible.

We fly about a mile above the surface.

My house is only a mile from here.

In 2004, two St. Helenian fishing vessels developed the capacity to fish beyond the 12 mile inshore waters of the island's 200 mile exclusive economic zone.

And the inconsistencies create, fundamentally, this last mile problem.

Diarrhea, and many last mile problems, are like that.

Now, a six mile wide rock is very large.

So it's about a mile across, 600 feet deep.

But when I went up on top, it was a mile and a half of wildflowers running right through the middle of Manhattan with views of the Empire State Building and the Statue of Liberty and the Hudson River.

So, let me now talk about the last mile problem.

That's what I'm talking about as a last mile opportunity.

But you know what we do on the last mile?

Three hours of bottom time, average distance traveled one mile.

So this is what you call a last mile problem.

The desert was advancing by a mile or two a year.

Whoever compels you to go one mile, go with him two.

And that, to me, is the fundamental challenge of the last mile.

But a trained liespotter can spot a fake smile a mile away.

How do you use your million to solve this last mile problem?