George Washington leads his troops across the Delaware River in 1776 during the Revolutionary War in this painting by Emanuel Leutze. AP hide caption

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Distrusting Government: As American As Apple Pie
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Atchafalaya Pipeline Fiddlers Five
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E. St. Louis Todalo Fiddlers Five
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Researchers Evgenia Ilyinskaya and Asgerdur Sigurdardottir sweep up volcanic ash from a small bridge just south of the Eyjafjallajokull volcano. The ash will be taken back to the University of Iceland for analysis. Joe Palca/NPR hide caption

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Inside The Plume, A Volcano Tells Its Secrets
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The MODIS instrument on NASA's Terra satellite captured an ash plume from the Eyjafjallajokull volcano on Friday. Though satellite images can tell scientists where the ash is, they don't help forecasters determine how much ash is in the air — or at what point it becomes a hazard to airplanes. MODIS Rapid Response Team/NASA via Getty Images hide caption

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Hazy Ash Cloud Forecast Complicates Air Travel
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The Incredible Shrinking Man Dick Jacobs & His Orchestra
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The Day The Earth Stood Still Bernard Herrmann & His Orchestra & Dr. Samuel J. Hoffman
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Nocturne No. 1 in B-Flat Minor, Op. 9, No. 1 Jacques Loussier
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Solo Piano: Impressions on Chopin's Nocturnes
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Nocturne No. 11 in G Minor, Op. 37, No. 1 Jacques Loussier
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Researchers say it's not just loose skin that makes us look old; it's our bones. These skulls from the Smithsonian Museum of Natural History show the loss of definition in the lower face. Nate Lavey/NPR hide caption

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As Our Skin Sags With Age, So Do Our Bones
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You Go to My Head Roy Hargrove
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The Very Thought of You Roy Hargrove
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10 Miles to Nags Head Reverb Galaxy
Blue Whisper Fabrizio Sotti
Not So New Blues John Fedchock NY Sextet
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Live at the Red Sea Jazz Festival
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Pope Benedict XVI waves from the popemobile during his weekly general audience, in St. Peter's Square at the Vatican. Pier Paolo Cito/AP hide caption

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5 Years Into Papacy, Legacy At Stake For Benedict
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Part I: Ouverture Thomas Savy
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French Suite
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Part III: Atlantique Nord Thomas Savy
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Infra 5 Max Richter
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Infra
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Max Richter

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Gobi Gloria, for string quartet Ying Quartet
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Dim Sum
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Ying Quartet

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Sunset On The Gaza Pharez Whitted
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Transient Journey
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Pharez Whitted

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Up Jumped Spring Art Blakey
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Three Blind Mice, Vol. 1
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The Wind Cries Mary Johnny A.