Streets were decked out in black.

Belfast had sent out to this ship Titanic, with such pride with such hope on dhe tohave.

Her sink on her maiden voyage less than two weeks after she left, was such a dent to the prize off people here.

I think Belfast was clothed and shame on Great, and I think the Bob dark light has hung over us for many a long year.

It's always been a very difficult subject for Harland and Wolff.

We built it as best we could, but it just wasn't enough.

Basic facilities available later, such as the International Ice Patrol radar on 24 hour radio, could have easily prevented this historic disaster.

SS California was one of the ships, which was in the vicinity of where Titanic sank.

The unfortunate thing is that at that time there wouldn't have been 24 our radio monitoring.

So even though Titanic's radio operators were sending a distress signals in a lot of cases, they were just going into the ether because as we approached midnight and beyond, most of those ships had turned in for the night.

California was one of those when she was inside of Titanic as well.

You see, the Titanic sending up rockets kept more charcoal.

Who built the solid rocket boosters were very, very worried about the very cold temperature the team will be looking for ice or frost that may have formed on the tank or engines during the fuelling process.

They were planning to launch the shuttle at minus two degrees centigrade when the coldest launch to date had been a 12 degrees centigrade.

Saw these huge icicles hanging off the fixture of structure, often the orbiter off tank off the solid rocket boosters.

Nothing don't want, Just think they no way.

This is not just about technical failures, but also about a human failure at the heart of the space agency.

If you bring together these two factors, concern for the O rings performance at low temperatures on the lack of testing it really waas a disaster waiting to happen.

Chernobyl accident.

Noble acted Ellsworth Nuclear accident serious Cornell The damaged reactor fire has destroyed most of the reactor's core world's worst nuclear disaster.

Casually, rates are higher than those that have been announced by the Soviet Union so far.

We know next to nothing, and I don't think that they're going to accept international aid.

I don't know exactly what's happened.

Yes, situation is under control test that they were running.

It was supposed to be done during daytime reactor at another nuclear power plant in Ukraine.

Went offline.

Agreed.

Operator called the plant and Santa Kate.

Guys, you're not supposed to Shut down.

Just keep going until 11 p.m. They already started to slow down the reactor in preparation for the test on.

It was sitting in that situation for almost half of a day.

They didn't shut down.

The reactor still turned off some of the, uh, six guards that would have automatically shut it down if you bring a reactor down low.

They thought that they can handle the power level manual and appear to be not.

It took them longer than what they thought.

It went over into the next shift.

The post of midnight shift, arguably not the most experienced.

A shift to do this they brought it down to low became actually unstable that it didn't respond in a normal way to the actions that the operators were taken, Director said No, no, bring the control rods up and bring the power up on the reactor a little bit Maur so that we can conduct this agreement and they bring control rods up a bit and nothing sent.

Power of the reactors starts to come up.

Order was bringing the control rods back into the reactor.

Reactor is getting hotter and hotter, and the control rods are starting to come back in the channel's start to heat up.

And the control rods were stuck when cooling water was added instead of cooling things down.

When it hit the superheated fuel runs, it rapidly turned to steam on.

That caused an explosion with the heat of the reactor blew, Uh the top had no containment vessel built over the top to try to contain any explosion or a massive release of radiation.

The tipping going saw that begin to slide.

Then it started moving down the mountain.

One of the tip gang ran down to try to warn people, but the tip was running faster than he could.

This is a wall off calorie waist 20 feet high in volume.

It's 100,000 cubic meters, and it's coming down the mountain at about 20 miles an hour.

The waves that were coming down, what, what, nine meters high and a simply engulfed school rain destabilized tip contributing to its collapse.

A wall of mining waste float towards the town of Abba van, burying a row of houses on the glass junior school before coming to a stop.

People life changed forever.

It's difficult to say at the moment.

All I can say is that most of my Sunday school under that rubble Sunday school with that 50.

So almost 40 of my Children are under there.

Emergency Service's and volunteers from the village ran to the school in a desperate effort to save the Children's lives.