or tuning for 10 minutes of current events.

I'm Carl Azuz. First up, an international increase in security.

There are more visible police in airports across the U.S., train stations and tunnels,

places where masses of people gather and travel.

They're all in a state of heightened alert.

In several cities around the world,

even where officials say there are no specific threats at this time,

more security forces are on guard,

following Wednesday's terrorist attacks in the Belgium capital of Brussels.

Thirty- one people were killed and 270 wounded

when an airport and train station were targeted.

ISIS said it was responsible.

Belgian police say there were four attackers in all.

Two of them were brothers who died.

One of the suicide bombers hasn't been identified yet

and another suspected terrorist is on the run

after placing a bomb at the Brussels airport that did not go off.

Police raids continue throughout Brussels, which is under its highest terrorist threat warning.

A soft target is a place where people are gathered, such as an airport, train terminal,

or even a stadium where before they can get through screening,

they are essentially unprotected.

They are prime targets for terrorists.

From what we've seen from al Qaeda and from ISIS is that they train to attack soft targets.

They know that these are places where people are going to be gathering

and where they're going to be unprotected.

We saw that in the Paris attacks where a couple of the suicide bombings

happen outside of the Stade de France.

In Brussels, we saw the airport and the metro station.

One of the first things that authorities worry about after an event like Brussels

is the possibility of copycat attacks,

people who might just be thinking of doing something and they get inspired.

So, that's one of the reasons why you see an increase presence of police

in places like Times Square, in places like Penn Station.

You can only keep that increased presence for a few days.

It's intended to make sure that you show an increased vigilance.

But then the harder work begins behind the scenes.

Wherever you put the security cordon, there's still going to be a line.

And a line is always vulnerable.

So, the U.S. has a very robust system whereby they do sting operations

to try to find these people who are online, who are talking about carrying out an attack.

It's a very controversial tactic, but so far,

it has prevented a lot of attacks in the United States.

In other countries they're starting to copy that formula to try to do the same thing.

Next story today, a black box warning.

It's the strongest one that the U.S. government gives on the labels of dangerous medications.

And the Food and Drug Administration just decided to include a black box

on commonly prescribed opioid painkillers.

The warning itself mentions the risk of abuse, addiction, overdose, and death.

It already exists on extended release painkillers.

Now, it will appear on more commonly prescribed, immediate release opioids as well.

It's meant to further educate doctors as they prescribe these medications,

and it's part of an effort to fight an increase in overdose deaths.

Officials say prescription narcotics now

kill more Americans every year than car accidents.

Some critics say the FDA's move is too little, too late.

That abuse of these drugs has already killed too many people.

Others say the new warning won't make much difference,

or that it could make it harder for people with chronic pain

to get the medications that help them manage it.

Before we can explore your brain on opiates,

we need to understand a few things.

An opiate is chemical derived from opium and it's the key ingredient in heroin.

Those narcotics in your medicine cabinet, codeine, oxycodone, hydrocodone,

they're opiate-like, but they are man-made and more commonly referred to as opioids.

So, how do these chemicals affect the brain?

One big way is by exerting powerful pain relief to the rest of the body.

Chemicals flood the system, latch on to millions of opiate receptors peppered throughout the body.

Think of opiates and the receptors like puzzle pieces.

When they bind together, pain signals are dulled, or they go away all together.

If the brain already has opiate receptors,

doesn't that mean it can naturally provide pain relief?

That's right. Feel good chemicals like endorphins

are natural opiates that dull pain and also give you a rush.

The problem with manmade opiates that mimic endorphins,

take too many and they can overwhelm the system, give you too much of a rush.

That can lead to dependence or abuse.

Addiction becomes an ever bigger problem,

because opiates also slowdown breathing and heart rate.

Mix them with other things that slow down your body

and everything could grind to a halt.

In fact, every 19 minutes, someone dies of an accidental prescription drug overdose.

Most of the time, it involves an opiate.

It's now more common than dying in a car crash.

If you want to avoid that fate, don't take more than you're prescribed.

Don't use other people's prescriptions. Never mix opiates with alcohol.

And maybe try other ways of alleviating your pain,

like over the counter pain relievers and good old fashion exercise.

One of the ways our show is used worldwide is to help students and adults practice their English

and we welcome everyone who does.

That includes Lycee Francoise.

It's in the community of Tournefeuille, in Southwest France.

Stateside, we're stopping by Susan B. Anthony Middle School today.

It's in one of Minnesota's Twin Cities. The Panthers are prowling around Minneapolis.

And we've got some more big cats watching.

The Cougars of Albuquerque, New Mexico, they're at Kennedy Middle School.

Up next, what's likely the largest flying aircraft on the planet.

Now, when we say that, you might think this, the Hughes H-4, aka, the Spruce Goose.

It has the longest wingspan.

But well-before its maiden and only flight in 1947, people flew on airships and that was risky.

The lighter than air hydrogen that gave them lift was highly flammable.

And after the R101 airship disaster in 1930 killed 48 people,

and the Hindenburg explosion in 1937 killed 36,

safety concerns have haunted these aircraft.

Today, though, helium has replaced hydrogen

and carbon fiber,Kevlar and Mylar have replaced cotton fabric.

This ship doesn't have the speed or the cargo capacity of say a Boeing 737,

but it can land where passenger jets wouldn't dare to try

and it could signal the rebirth of the airship.

We see Airlander as the future of air travel.

It's going to be cheaper, it's going to be greener,

we're going to be able to go from places that you can't go from now.

It's going to be a whole revolution in how we knew air transport.

World's Biggest Aircraft Unveiled

Airlander 10 (ph) is a hybrid vehicle, a mixture of a heat lift vehicle

with helium lift and vectored trust and ergonomic lift.

So, a new type of aircraft. It's a 10-ton lift vehicle and it's 300 feet long.

British firm Hybrid Air Vehicles spent nine years refining its technology

and has now completed the full assembly of Airlander 10,

which was floated inside one of the world's biggest aircraft hangars.

It's really quite a special machine to fly.

The views you see from the flight deck was excellent because of large, large windows.

It's very special because it really has an agility and ability

that nothing else has at the moment,

plus 12 times capacity of fuel which allows them to fly up to 5 days,

doesn't get any prepared surface for operating

We can land it almost any flight surface, whether it's water, grass, sand.

It can land at no infrastructure at all.

The vessel was originally designed for surveillance by the U.S. Army,

and the military prototype flew from the first time in 2012.

But budget cuts doomed the project in 2013.

Hybrid air vehicles now hope to use the new Airlander for a mix of purposes.

Whether it's being in Safari, whether it's sightseeing in places,

whether it's doing surveillance work,

a whole range of uses being demonstrated with this vehicle.

The firm hopes the Airlander will fly outside the hangar this summer.

OK. The headline sounds awesome.

Massive exploding star caught on camera.

The video looks awesomer.

A massive exploding star caught on camera.

But this, sorry to say, is just a cartoon animation.

The actual footage, maybe not as awesome. Yes, there you go.

An optical wavelength measurement provided by the Kepler telescope

that indicates what scientists say is the explosive death of a star hundreds of millions of light years away

that began with the 20- minute shock breakout

and progressively got brighter over a period of two weeks.

But if you want to talk about a massive supernova going out in a blaze of glory,

the cartoon is a better place to start.

Starring down startling discoveries is an e-star-nation.

A star-entific de-star-nation that's always on star-get.

Will scientists one day capture actual video like that?

Never say nova.I'm Starl Azuz and CNN star-dent news stars again tomorrow.