Tonight the new storm threat in the Midwest on top of the catastrophic floods and have left a dam on the brink.

The stunning new images widespread flooding across three states, neighborhoods devastated in South Dakota. Streets completely caved in. Homes and vehicles

washed away and teetering on the edge. In Minnesota, officials confirming a partial failure

at a dam southwest of Minneapolis.

We're in the storm zone tonight.

Also this evening just two days before the Joe Biden

and Donald Trump debate,

the final preparations.

And our new reporting could Mr Trump announce his BP pick before the debate.

WikiLeaks founder Julian Assange boarding a plane to freedom.

The plea deal he struck to end his years long standoff with the US government

for publishing a trove of classified documents.

The deadly violence in Kenya, police opening fire, as thousand stormed the parliament.

What's driving these protests?

NBC News investigates the search of more than 50 migrants

with possible ties to an ISIS-affiliated smuggling network released into the US, their whereabouts unknown.

And the American track star overcoming life's hurdles for his shot at gold in Paris.

This is NBC Nightly News with Lester Holt. Reporting tonight from Aspen, Colorado.

Good evening from Aspen, Colorado, where thought leaders have gathered for the Aspen

Ideas Festival, of which NBC Universal is a media partner.

We'll tell you more on that later.

But let's begin with a flood emergency

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