All Things Considered Every weekday, All Things Considered hosts Ailsa Chang, Audie Cornish, Mary Louise Kelly and Ari Shapiro present the program's trademark mix of news, interviews, commentaries, reviews, and offbeat features. Michel Martin hosts on the weekends.

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All Things Considered for July 22, 2012

Visitors view the AIDS Memorial Quilt at the National Mall in Washington, D.C., where the International AIDS Conference is being held this week. Ebony Bailey/NPR hide caption

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Ebony Bailey/NPR

Testing, Treatment Key Weapons In AIDS Fight

Testing, Treatment Key Weapons In AIDS Fight

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There are millions of killers loose in California, and eucalyptus trees are their victims. Entomologist Timothy Paine has been studying the insects killing California's menthol-scented trees for two decades — and he's noticed a suspicious pattern. George Rose/Getty Images hide caption

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George Rose/Getty Images

Invasive Pests, Or Tiny Biological Terrorists?

Invasive Pests, Or Tiny Biological Terrorists?

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Actor Harrison Ford as Han Solo in Star Wars Episode V: The Empire Strikes Back. AP hide caption

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AP

The Movie Donald Faison Has 'Seen A Million Times'

The Movie Donald Faison Has 'Seen A Million Times'

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Nas, who at 38 has just released his 10th album, Life Is Good. Courtesy of Def Jam Records hide caption

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Courtesy of Def Jam Records

Nas On Marvin Gaye's Marriage, Parenting And Rap Genius

Nas On Marvin Gaye's Marriage, Parenting And Rap Genius

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All Things Considered