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Alfons R. of Hamburg, Germany, (shown in this undated photo) converted to Islam at age 17. Later, he went to Turkey, then Syria, to join ISIS and was killed this past summer.

From German Teen To ISIS Jihadist: A Father's Struggle To Understand

Manfred Karg says he doesn't know how his eldest son, Alfons, became mixed up with radical Islamists.

Whatever happened, the German pensioner's 19-year-old son from Hamburg is now dead, one of at least 60 Germans killed fighting alongside ISIS militants, nine of them in suicide attacks, according to German authorities.

Karg says two young men with an "immigrant background" knocked on Alfons' mother's door to tell her of his death in Syria last summer.

"When she opened up, they said: 'Congratulations, your son is now in paradise,'" he says.

Shortly before they left Qatar on Wednesday, Grace and Matthew Huang spoke with Dana Shell Smith, the U.S. ambassador to Qatar, at the Hamad International Airport in Doha.

American Couple Detained In Qatar Allowed To Return Home

Matthew and Grace Huang, an American couple who had been forced to remain in Qatar over the death of their adopted 8-year old daughter in 2013, have left the country en route to the United States.

On Sunday, an appeals court cleared the Huangs of all charges in their daughter's death, but as they arrived at the Hamad International Airport in Doha later that day to fly home to California, the couple were detained again. Qatari authorities said another appeal had been filed in their case and that they could not travel.

That travel ban was lifted Wednesday.

Eric Garner (right) poses with his children. A grand jury has decided not to indict a New York police officer over Garner's death in July.

NYC Grand Jury Does Not Indict Officer In Chokehold Case

A grand jury has decided not to indict a New York police officer in the death of Eric Garner on a Staten Island sidewalk this past July.

The encounter between Garner and officer Daniel Pantaleo caused an uproar after video footage of the incident was released. It showed Garner repeatedly gasping, "I can't breathe," as Pantaleo and other officers took him to the ground.

Garner family attorney Jonathon Moore says he's "astonished by the decision," member station WNYC reports.

Kentucky Sen. Rand Paul speaks to the Chase Federalist Society at Northern Kentucky University last month in Highland Heights, Ky.

Sen. Rand Paul Introduces Declaration Of War Against ISIS

Saying President Obama does not have the authority to wage a war against the so-called Islamic State, Sen. Rand Paul, a Republican from Kentucky, introduced a measure declaring war against the Sunni militant group.

Obama declared a war against the group back in September. Administration officials have said that they believe Obama could order military action against the group relying on the Authorization for Use of Military Force passed by Congress in 2001.

HIV is like a jack-in-the-box: When it binds to a cell, its shell (yellow) pops open, and its genetic material (reds) comes out.

Is HIV Evolving Into A Weaker Virus?

Viruses are masters at mutating.

So the big concern with deadly viruses, like Ebola and hepatitis C, is that they will evolve into more dangerous forms over time.

It looks like just the opposite is happening with HIV — although it's happening slowly.

"HIV can generate any mutation in the book, on any day," says virologist Philip Goulder at the University of Oxford.

A healthcare worker wheels a stack of freshly washed boots to ELWA 3.

Startling Statistic: Only 8 Patients In Largest Ebola Hospital

Sometimes you stumble across statistics that just scream at you. I was looking this week through some reports on the Liberian Ministry of Health's website. The screaming statistic was an "8" listed as the number of people "currently in treatment" at the ELWA 3 Ebola Treatment Unit run by Doctors Without Borders in Monrovia.

That couldn't possibly be right, I thought. ELWA 3 is the largest Ebola hospital ever built, with 250 beds. I was at the site when it was being built in August, and later when it was full.

Under Executive Action, Immigrants Are Entitled To Social Security Benefits

We're a little late to this news, but we're pointing it out to set the record straight: The White House says immigrants protected under President Obama's executive action will be eligible for Social Security benefits.

An inside view of this fossil <em>Pseudodon</em> shell shows that the hole made by <em>Homo erectus</em> is exactly at the spot where the muscle attached to the shell. Poking at that spot would force the shell open.

Earliest Human Engraving Or Trash From An Ancient Lunch?

Scientists have discovered enigmatic markings on an ancient shell that's been sitting in a museum for more than a century — and they believe this may be the oldest known example of a deliberate geometric engraving made by a human hand.

Want To Perk Up Your Love Life? Put Away That Smartphone

Are you reading this after a long day's work, lounging in bed with the love of your life?

If so, I promise I won't feel bad if you stash the phone to take some time to talk in real life.

But if you're still reading, you're probably not alone — 70 percent of women in a recent survey said smartphones were interfering in their romantic relationship.

Texas death row inmate Scott Panetti has had a long history of mental illness but was allowed to defend himself at trial. He is scheduled to be executed next Wednesday.

Federal Court Halts Execution Of Mentally Ill Texas Prisoner

A federal appeals court has halted the execution of Scott Panetti, a Texas prisoner convicted in the 1992 murder of his in-laws.

The 5th U.S. Circuit Court of Appeals granted a reprieve just hours before the 56-year-old inmate was scheduled to be killed via lethal injection. The court said it needed more time to "consider the late arriving and complex legal questions at issue in this matter."

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