Waching daily Aug 29 2017

- We're pushing forward our highly promising Strategic

Defense Initiative, a security shield that may one day protect

us and our allies from nuclear attack.

NARRATOR: President Reagan's vision for a Space Age missile

shield never made it beyond the realm of video games.

And that's still how people often tend to picture it.

Even in real life, anti-missile systems often sound like

impenetrable forcefields.

REPORTER: The system spotted a missile and quickly fired.

- 42 scuds engaged, 41 intercepted.

- A 90% success rate in neutralizing the missile

threat.

NARRATOR: But the reality is that intercepting a supersonic

ballistic missile hurling through the sky is anything

but simple, let alone foolproof.

For starters, how far and how fast a missile can go varies

widely.

There's short range, medium range, intermediate range,

then, of course, the Intercontinental Ballistic

Missile, or ICBM.

All of them go through multiple stages of flight.

First is the boost phase.

That's followed by the midcourse phase and the final descent

before detonation, the terminal phase.

To take out a ballistic missile, you need sensors that can track

the incoming warheads and launchers that fire

interceptors-- special missiles that can destroy warheads

simply by colliding into them.

But not all missile defense is created equal.

The US uses two different categories to counter North

Korea.

There's theater defense, and there's homeland defense.

Theater defense is regional.

It includes the anti-missile systems in places like South

Korea, Japan, and Guam that shield American troops

and allies from short and medium-range missiles.

For example, US bases across the region are armed with a Patriot

PAC-3, which intercepts tactical warheads at close range just

before impact.

There are also 19 US warships in the Pacific mounted with Aegis

naval defense radar and launchers.

The ships can fire SM3 interceptors into space to take

out warheads in the midcourse phase of flight.

And there are high-tech truck-mounted launchers in Guam

and South Korea, part of the Terminal High Altitude Area

of Defense, or THAAD.

Designed to be agile and mobile, each truck launcher carries

eight interceptors capable of destroying missiles 125 miles

away, inside or outside the atmosphere.

Experts say that the theater defense systems are not likely

to intercept every missile in a real life attack,

but they've fared well in field tests.

It's an entirely different story when it comes to homeland

defense.

The system protecting the continental US is called

Ground-Based Midcourse Defense.

It has between 36 and 44 interceptors in Alaska

and California, and so far, a track record that might keep

you up at night.

In 18 test launches since 1999, target missiles have been hit

only 10 times.

What's the problem?

A tough target.

The system aims to destroy ICBMs,

which fly far higher and faster than lower-range missiles.

Experts say it's like trying to hit a bullet with a bullet--

bullets that may be flying 20 times faster than the speed

of sound, three times higher than the International Space

Station.

The task is further complicated by the flurry of debris

released when the nuclear warhead separates from the rest

of the missile in space.

Differentiating the warhead from the debris in the threat cloud

is difficult. Experts say even a rising nuclear power,

like North Korea, is capable of using simple decoys or multiple

missiles to confuse the sensors.

And this system is not even designed to defend against

advanced ICBMs from China or Russia.

Ground-based Midcourse Defense is far from a magic shield.

But right now, it's the only system protecting the US.

For more infomation >> Is the U.S. Ready for a Nuclear Attack? | The New York Times - Duration: 4:11.

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Hospital Worker Precious Johnson is fighting for $15 and union rights - Duration: 0:50.

My name is Precious, I work at St. Luke's on South 27th St.

I've been there 2 and a half years.

I currently make $14.43 an hour.

I do have children, well I have a child, I have one, he's a boy, he's three years old.

And I'm also responsible for a 32-year-old special needs brother.

My everyday struggles with Aurora are- I mean my everyday struggles with life-

First are rent, bills, providing for my child and myself, as far as food and clothing and transportation.

I don't have any health insurance right now.

So I can't take care of myself health wise and what not.

And it's just really hard being an aide right now.

Anyone that's in healthcare I salute you.

It's a harder job.