FBI Conducting Tests on Obama Letter, Carney Says

April 17 (Bloomberg) -- White House Press Secretary Jay Carney talks about a letter addressed to President Barack Obama containing a substance that the FBI said was positive for the poison ricin in preliminary testing. The letter was intercepted before reaching the White House. Carney also discusses the Boston Marathon bombings and Obama’s bid for new gun-control measures. (Source: Bloomberg)

Goldman's Currie: Investments Pressure Oil Cost Structure
38:11 - Jeff Currie, global head of commodities research at Goldman Sachs, discusses drilling costs in shale and the factors boosting the metals and mining sector. He speaks on "Bloomberg Daybreak: Americas." (Source: Bloomberg)
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