1

Traumatic brain injuries are most often caused by powerful blasts from improvised explosive devices. A roadside bomb explodes, and the concussive effect violently shakes the brain inside the skull. Stefano Rellandini/Reuters /Landov hide caption

itoggle caption Stefano Rellandini/Reuters /Landov
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Stars and Stripes Forever Jelly Roll Morton 0:20

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    Jelly Roll Morton
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    Stars and Stripes Forever
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    Deadwood: Music From the HBO Original Series
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    Lost Highway

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Flippen Punch Brothers 1:30

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    Punch Brothers
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    Flippen
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    Who's Feeling Young Now?
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3

Alexei Venediktov, then editor-in-chief of Moscow Echo radio station, talks with Russian Prime Minister Vladimir Putin during an awards ceremony in Moscow, Jan. 13. Venediktov's ouster this month is seen as a sign that the Russian government may be cracking down on the independent media. Yana Lapikova/AFP/Getty Images hide caption

itoggle caption Yana Lapikova/AFP/Getty Images
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4

Voice of America was criticized after the veracity of its interview with a Russian anti-corruption activist was questioned. In this photo provided by the network, a control room is seen during a Russian-language Web show. Voice of America hide caption

itoggle caption Voice of America
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Nocturne of the Neon Night Laika & the Cosmonauts 0:05

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    Laika & the Cosmonauts
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    Nocturne of the Neon Night
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    Local Warming
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    Yep Roc

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Disco-Plank Laika & the Cosmonauts 0:30

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    Laika & the Cosmonauts
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    Disco-Plank
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    Local Warming
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    Yep Roc

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5

A family of bears investigates a Dumpster behind a diner in Pomona, N.Y., last fall. Black bears are becoming more common in populated areas around the United States. Eddy Philippe/AP hide caption

itoggle caption Eddy Philippe/AP
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Tennessee Christopher Hedge/David Grisman/R. Carlos Nakai 0:20

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    Christopher Hedge/David Grisman/R. Carlos Nakai
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    Tennessee
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    Andrew Jackson: The Atrocious Saint

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Intimo Sam Bush & David Grisman 0:30

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    Sam Bush & David Grisman
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    Intimo
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    Hold On, We're Strummin'
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    Acoustic Disc

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Ode Brad Mehldau 0:05

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    Ode
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    Ode

26 Brad Mehldau 1:30

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    Ode

10

The University of California Pavement Research Center in Davis works on creating longer lasting, quieter and more fuel-efficient pavement. Above, samples of asphalt being tested at the center. Lauren Sommer/KQED hide caption

itoggle caption Lauren Sommer/KQED
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The Simpsons Various Artists 0:20

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    Various Artists
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    The Simpsons
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    TV Guide: 50 All-Time Favorite TV Themes
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Release the Hounds Hans Zimmer 0:56

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    Hans Zimmer
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    Release the Hounds
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    The Simpsons Movie
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    Twentieth Century Fox

10: 35 I Turn Off Camera 3 Original Soundtrack 0:20

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    Original Soundtrack
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    10: 35 I Turn Off Camera 3
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    Ocean's Twelve
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    Warner Bros.

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Stealing the Stock (into) Le Renard de Nuit Original Soundtrack 1:30

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    Original Soundtrack
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    Stealing the Stock (into) Le Renard de Nuit
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    Ocean's Twelve
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    Warner Bros.

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The Blind Leaving the Blind: 3rd Movement Punch Brothers 0:15

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    The Blind Leaving the Blind: 3rd Movement
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The Blind Leaving the Blind: 4th Movement Punch Brothers 0:28

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    The Blind Leaving the Blind: 4th Movement
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Sweet Los Amigos Invisibles 0:20

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    Los Amigos Invisibles
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    Sweet
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    Not So Commercial
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    Nacional Records

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Este Bolero Es para Ti DJ Afro 0:30

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    DJ Afro
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    Este Bolero Es para Ti
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    Free

Gratitude Todd Clouser 0:20

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    Todd Clouser
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    Gratitude
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    20th Century Folk Selections
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    Royal Potato Family Records

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A-frame Garage a Trois 0:20

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    Garage a Trois
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    A-frame
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    Emphasizer
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    Tone-cool/artemis

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Oh! Tinnitus Cigarbox Planetarium 0:20

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    Cigarbox Planetarium
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    Oh! Tinnitus
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    Society of Rubber Cement

Tiny Dream Car Cigarbox Planetarium 0:55

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    Cigarbox Planetarium
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    Tiny Dream Car
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    Society of Rubber Cement