see you this Thursday. First up, a new clue in the mysterious disappearance of a passenger plane

over the Mediterranean Sea. Egypt air flight 804 vanished on May 19th. Several countries have been

involved in the search for the plane, but so far, they've found only debris. There've been more questions

than answers. Yesterday, though, investigators said that a French Navy ship detected signals

from one of the plane's flight data recorders with information about the plane's airspeed, altitude,

engine status, and wing positions. The so called Black Box could hold the answers as to what exactly

caused the aircraft to crash. And it helps investigators narrow down the area of the Mediterranean

where they're searching. But the flight recorders only give out signals for about 30 days after they get wet,

so officials are in a race against time.

This is a huge breakthrough in the investigation of Egypt Air flight 804. Which two weeks ago was

traveling from Paris to Cairo when it disappeared from radar. There had been a massive search

underway. Pieces of debris have been recovered as well as body parts. It was the French naval ship

Laplace which located the signal from one of the black boxes, they haven't been able to locate the other

black box yet. Another ship will be coming within a week which has sophisticated means to recover the

wreckage from the sea floor which could be at depths of 3, 000 meters, that's 10, 000 feet. Once those

black boxes are recovered they will be analyzed. Hopefully, they haven't been damaged by the crash.

And, once they are analyzed, here in Cairo, investigators hope it will give them some insight into

what exactly happened on that plane. They're also hoping that, with the recovery of the black boxes they'll

be able to recover the fuselage, another clue, another piece of evidence which will help investigators.

Also for the families. 66 people died in this crash. The families are hoping this news will also help in

retrieving their loved ones so they can give them a proper burial. Ian Lee in Cairo.

US State Department, which oversees the country's foreign affairs, is warning Americans about

traveling to Europe. It says the large number of tourists who visit the continent over the summer could

possibly be targets for terrorists, especially at large public events. We reported earlier this week

how terrorists are trying to sneak into Europe among the scores of migrants and refugees going there.

And a French intelligence official recently told CNN that police don't think they've arrested everyone

involved in recent terrorist attacks in Paris, France, and Brussels, Belgium. Well, the US State Department

has made it clear that this latest alert is not in response to a new or specific threat, but rather a more

general warning to US citizens travelling in Europe about the potential for a terrorist attack on the

continent. It names some big events, specifically including the Tour De France,

The Catholic Church's World Youth Day in Poland,

as well as the European soccer championship in France known as EURO 2016.

Now EURO 2016 has been particularly an important one for French authorities considering intelligence

officials believe that may have been the original target of the terrorist cell behind the Brussels attacks.

And French authorities really taking no chances when it comes to security preparations for that, deploying

some 90, 000 security personnel just yesterday. At the Stade de France they held a security exercise, one

of dozens of exercises to be held throughout the country. Designed not only to get security personnel

ready for Euro 2016, but also to assuage the fears of the public. French authorities have expressed

confidence in their preparations, security wise. For not only the matches to be held in stadiums but also

the fan zone's large outdoor spaces where fans will be able to enjoy the matches as well. It's worth

mentioning that France is still under a state of emergency and that has been extended through Euro

2016. The U. S. travel alert is expected to expire August, 31st. Erin McLaughlin, CNN Brussels.

Here we go with a quick check of three of the schools watching this Thursday and making a

Roll Call request at CNNStudentNews. com. Mendive Middle School leads things off for us.

They're working a little magic from the city of Sparks, the state of Nevada. From Prince George, Virginia,

a very royal welcome to the Royals of Prince George High School. And it's great to see our viewers

at Gomarus Scholengemeenschap. It's in the city of Gorinchem. Netherlands. Businesses, banks,

and governments are looking for a few good computer hackers. And by good, they mean certified,

ethical hackers. People paid to test and protect an organization's electronic information from the

kind of hackers who might be looking to steal it.

In the US, certified ethical hackers can eventually earn as much as $ 130, 000 per year. What do you think

of when I say the word hacker? Some creepy dude in a basement? Well, that's a misconception.

What if I told you that there's a class of hackers who don't just have social skills, they have more social

intelligence than anyone you'll ever meet. David Kennedy is one of them. He's what's known as a social

engineer or a people hacker. His craft is to dupe you into doing things things,

and sharing information you probably shouldn't.

Can I just get your credit card number?

Some use it for illegal activity. In David's case, companies pay him to find out if employees are leaving

the company vulnerable. He and his team show us how it's done. Step one, spoof his number so

it looks like he's calling from inside the company, and then call tech support.

Hello, are you there? Hello?

Hi, this is Ken. How may I help you?

I was wondering if you could take a look at a website I'm trying to get to. It's for a big customer

thing I'm working on for Monday, and I can't seem to get to the website from my computer.

Sure, what's the website? I'll see if I can get to it.

Thanks man, I really appreciate the help, I mean it could be a stupid thing. I really suck at computers,

so it's www. survey, that's S- U- R- V- E- Y- pro. . com?

Yeah, I got a prompt to open. I just clicked open and I'm at the site now.

Here's what the IT guy doesn't realize. By clicking that link, he's just given David full access to his computer.

Okay, that's weird. I just hit it and it works and it seems like it's working fine now. Awesome,

I don't know what you did man, but I really appreciate the help. Hey, no problem. That was easy.

That was it?

We're on his computer right now.

You were able to take over this guy's computer within, I would say like, under two minutes.

Under two minutes, yeah. Under two minutes, took over his entire computer, and think of it as not

just this computer, but it's pretty much the downfall of the entire company.

In this case the company was paying David to hack them and see if their employees would fall for it,

and they did. To show you this demo, we agreed not to use the company's name. Kennedy hacks to

protect. He's part of a growing number of hackers using this skill for good. Josh Corman's one of them, too.

He started a group to help bridge the gap between hackers and big companies.

Hacking is a form of power. Not surprisingly, if you walked into my house and saw all the Spiderman stuff,

I'm a big fan of the family line of with great power there comes great responsibility. We're coming to

a point where the outside world with a breach a week, a breach a day, affecting people's personal lives.

National security, we gotta grow up a bit. And we need to be very deliberate about how we use that power.

Corman formed the group after his mom passed away.

She was my science teacher. She kinda taught me that darkness is the absence of light. Cold is the

absence of heat. If you see something missing in the world, maybe it's our job to put it there.

I think the world's gonna be whatever we want it to be and whatever we make it. There are very

very bad people which means it falls to the good people to try to fight it.

You feel like you have a very personal responsibility.

We have so much potential to shape our culture, our values, our safety. If not us then who?

It's a question maybe not everyone's asked. How many hugs can someone give in a minute? And the answer,

79. You can give 79 hugs in a minute. We know that thanks to this man in India along with the assistance

of a whole bunch of students. They wrapped their arms around a Guinness World Record defeating the

old hug high mark by two people. This is definitely quantity over quality and some squeezes were actually

disqualified because a genuine hug is defined by having both arms wrapped around another person.

But why be upset about that? They can always hug it out. They know they've tried to squeeze in

everyone they could in the hopes of class being the record. And now that they've clinched it, they truly

deserve a pat on the back. Because now that they've successfully embraced one challenge.

Maybe this is just the huginning. I'm Carl Azuz for CNN Student News.