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The Australian singer-songwriter performs a career-spanning set of country, rock, folk and more.

Insurgent candidates won contested congressional GOP primaries in two states Tuesday. In a Kentucky district, the favorite for the fall prevailed thanks to some assistance from a wealthy 21-year-old benefactor.

Clostridium difficile is a nasty bacterial infection that used to strike mainly older hospitalized patients taking antibiotics. In findings presented at a conference this week, Mayo Clinic researchers say it's now cropping up in communities, and infecting children.

The U.S. and other world powers hope to lay out a step by step process that will eventually lead to an end to Iran's nuclear enrichment program. Iran hopes to ease punitive sanctions that are choking its economy.

Campaign fever is in the air in Cairo and around Egypt. Millions of voters go to the polls, Tuesday and Wednesday, for what many believe to be the country's first free election in its long history. Host Michel Martin discusses what's at stake in this election with Sherine Tadros, the Egypt correspondent for Al Jazeera English.

Whoever wins in November may go down in history as the First Robot President. Not because people have found Barack Obama and Mitt Romney robot-like on occasion (although they have). But because the next occupant of the White House will face a growing influx and influence of robots in our everyday lives.

Advocacy groups disagree about how to produce food sustainably and how to market it to consumers. Look no further than the more than 365 food certification programs out there, says one food company director.

The classical music world lost one of its legendary figures last week. The German baritone Dietrich Fischer-Dieskau died ten days short of his 87th birthday. He was one of the most recorded classical singers in recording history. Classical music critic Lloyd Schwartz was one of his admirers.

There's a persistent shortage of organs for transplantation in this country, and it's getting worse. Federal law bans financial incentives for organ donations. Is it time to reconsider? Some calls and emails from listeners illuminate the range of opinions on the controversial subject.

A British auction house is selling a lab vial purportedly containing a dried blood sample taken from the late president on the day he was nearly assassinated in March 1981. The auction has caused a controversy, with some denouncing the possible sale of the blood sample as a new and crass low in presidential memorabilia.