Its Monday, June 26, has Russia's mighty bear just become a sitting duck.

We start here.

In the greatest challenge we've ever seen to Vladimir Putin's power, the president's former

confidant attempts a coup.

It was almost as though the Kremlin was saying, let's pretend like the whole thing never

happened.

We'll walk you through the bizarre 36 hour timeline and ask what it means for one of the

world's great nuclear powers.

This is a turning point.

This is a paradigm shift in the history of modern Russia.

Meanwhile, people say there were warning signs for the Titan submersible because they

gave the warnings.

He says in the email, the fact that you indirectly told me not to speak about the noises I heard

on the dive, to me says a lot.

The investigations are beginning, so what will authorities be looking for?

From ABC News, this is Start Here.

I'm Brad Milky.

Hello, and whoo, what a week to take vacation.

Luckily, last week we had some stellar guest hosts here describing a tragedy in the deep sea,

a plea deal by a president's son, and perhaps none of that will have as far reaching implications

for the world as what we've just witnessed in the last 72 hours.

All eyes are going to be on Moscow over the coming days.

...