"It is crucial that national authorities do not rush to give information on source of infection which is not proven by bacteriological analysis, as this spreads unjustified fears in the population all over Europe, and creates problems for our food producers selling products in the EU and outside of the EU."

VOA: special.2011.06.10

Three subsequent tests of the mask by the National Bioforensic Analysis Center came back positive for ricin, the document states.

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An expert at the National Bioforensics Analysis Center in Fort Detrick, Md.

NPR: Tests Link Deadly Ricin To Obama Letter Suspect

Sterling Burnett, senior fellow for the National Center for Policy Analysis, says government incentives skew national energy policy and that they should end for both the renewable sector and oil and gas industries.

FORBES: Obama and Romney Drill for Energy Answers