Thousands of Iraqi troops advancing on Mosul.

And take a look tonight.

Iraqi forces approaching the city a line of tanks there and watch the left side of your screen.

ISIS responding with suicide bombers inside cars.

Driving right toward those tanks,

at least a dozen attacks like that one there already.

Just after dawn, Iraqi tanks rolled into battle.

Artillery and airstrikes pounded ISIS positions.

The offensive officially underway to retake Mosul from ISIS.

That was one of the rockets heading out, down towards, into the planes around the city of Mosul.

The sun has come up.

But as the day wore on, the terrorist group showed it was not going down without a fight.

This suicide truck bomber careened into a line of Iraqi tanks, then exploded, giant flames

shooting towards the sky.

Another drove towards a Kurdish convoy. The troops yelling as they spot the attacker.

Then the sound of the explosion. ISIS claimed 12 suicide bombings in the battle today,

backing the anti-IS forces American troops, advising and calling in air strikes like those we saw throughout

the day on a Kurdish base.

That progress seen from a drone, abandoned villages that the advancing forces now warn may

be booby-trapped.

The fighters tell us that the biggest obstacle to their advance is the deadly IEDs all

along the road, so even with considerably greater firepower,

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