The first story we're talking about today is in Northern Ireland.

Protests have been going on there for about a week now.

The ones yesterday in the Northern Irish capital of Belfast.

They started out peacefully, but some of them turned violent later on.

There's a lot of history behind these protests and it starts with geography .

Here is Northern Ireland.

What's interesting is that it's not actually part of the Republic of Ireland.

It's part of the United Kingdom and that's what's behind this tension.

Nationalists who are mostly Catholic think Northern Ireland should be part of the Republic of Ireland.

Unionists or Loyalists who are mostly Protestants wanted to stay part of the United Kingdom.

The conflict between those two groups lead to decades of violence.

More than 3,000 people were killed a peace deal was signed in 1998.

The protests happening are connecting to a decision that regarding the British flag.

In Belfast, the capital of Northern Ireland, the flag used to fly over city hall everyday of the year.

Last month, local officials decide to limit that to 18 days per year.

Unionists weren't happy about that.

They've been protesting in front of city hall and other spots around Northern Ireland.

In some cases, protestors have fought with police officers.

They've thrown concrete blocks, bricks, even gasoline bombs at police.

Officers have responded by using water cannons to break up the protests.

Some Protestants and Catholic have also been fighting with each other.

We are staying in Europe for our next story which takes from Northern Ireland down to Italy.

One year ago yesterday, a cruise ship ran aground off the Italian coast.

A lot of you remember this.

There were 3,200 passengers on board the Coast Concordia.

There were another 1,000 crew members and 32 people on that ship lost their lives in the accident.

Family members for the victims and some of the people who survived the wreck gathered for memorial service on the anniversary.

A larger boulder with the victims' names was lowered into the sea and relatives tossed notes into the water.

This is what the Coast Concordia looks like now.

It's still on its side in the water.

Crews are working to salvage the ship to get the thing upright and towed into port.

Those efforts are taking longer than expected.

And officials say it could take until this September.

Next up, we're heading to the capital of China, Beijing.

Experts say that city has something in common with Los Angeles: smog.

This gray haze is hanging in the air, making things hard to see.

Yesterday, the smog levels in Beijing hit record levels.

The number is off the charts.

Authorities warn people there to stay inside.

Last year nearly 700 flights were canceled at Beijing airports because of haze and smog.

Officials in China say that the air quality in the capital has gotten better since Beijing hosted the 2008 Olympics.

But residents say the pollution levels have gotten worse.

Back in the US, two sides of the country experience various different kinds of weather this weekend.

On one coast, you had freeze mornings;

on the other, you had people walking around in shorts.

You might expect the warmer temperatures to be out west, no, not the case here.

It was 30 degrees below normal in some spots there.

Overnight low in Los Angeles: 38 degrees.

A freeze morning in Phoenix, Arizona.

And then you move over to the east, and some cities have temperatures that were 30 degrees above normal.

In Washington D. C., the high on Saturday was 62. Here in Atlanta, 76.