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DAVID GREENE, HOST:

After the tragedy in Newtown, Connecticut on Friday, many parents dropping their kids off at school this morning are facing a lot of anxiety. Today in Your Health, we asked NPR's science correspondent Shankar Vedantam to come by to talk about how tragedies shape our perceptions of risk.

Shankar, good morning.

SHANKAR VEDANTAM, BYLINE: Good morning, David.

GREENE: So tell us what we know from school shootings of the past. I mean, what sort of impact will this tragedy have on parents and how they think?

A federal court in Texas on Monday will take up the case of a high-school student who refuses to wear her location-tracking school ID.

The 15-year-old sophomore says the ID badge, which has an embedded radio frequency identification tag, is a violation of her rights. The student, Andrea Hernandez, believes the ID is "the mark of the beast" from the Book of Revelation.

An old complaint about the safety of childhood vaccines is finding new life at the United Nations.

The U.N. Environment Program is considering a ban on thimerosal, a vaccine preservative that is widely used in developing countries. The program expects to make a decision sometime after a final meeting on the issue in January.

Behind a tall metal gate in a nondescript nook of Kabul sits the Bamboo Wood Industries factory. It's not a place you're likely to stumble across by accident. Inside, a handful of men are cutting, painting and assembling desks and cabinets. The pieces being made are chocolate brown and quite modern looking.

Sitting in a spartan, unheated office above the factory floor is Fatima Jafari, the owner of the company. The 30-something woman started the business a little over a year ago.

This weekend, millions of Americans trekked across Middle Earth with Bilbo Baggins. The result? The Hobbit: An Unexpected Journey was No. 1 at the North American box office. It joins the list of other films that ranked No. 1 one their opening weekends, such as Underworld Awakening, Paranormal Activity 4 and Batman.

But here's the thing: The weekend battle at the box office doesn't necessarily decide the war in Hollywood, says Edward J. Epstein, author of The Hollywood Economist. Epstein says to be skeptical of what you read in Hollywood rags.

SPECIAL: El Paso Wind Symphony - Winter Wonderland
Norma Martinez hosts this special Holiday performance of the El Paso Wind Symphony under the direction of Dr. Ron Hufstader.

Keith & Russ talk with Jason White, head of the Department of Analytical Chemistry at the Connecticut Agricultural Experimental Station.  White talks about testing the toxicity of nanomaterials against plants.  He has found that smaller particles of nanomaterials such as silver tend to be more toxic than larger particles, especially when they begin to accumulate.  Aired Dec. 16, 2012.

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GUY RAZ, HOST:

It's WEEKENDS on ALL THINGS CONSIDERED, from NPR News. I'm Guy Raz. Yesterday on the program, we spoke with pastor and poet Eugene Peterson. He's retired now, but he was the pastor at Christ Our King Presbyterian Church - near Baltimore - for 30 years. Back in the 1990s, he began to translate the Bible into modern-day English. It became the best-selling book called "The Message." It's a book millions of Christians and non-Christians alike, have come to rely on.