The main contrast drug used for MRI is a silvery-white element called gadolinium.

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Griffin, the former Clinton aide, said such an organization would introduce a brand new element to White House outreach.

NPR: Obama Bypasses Congress With Public Economic Pitch

This week, as NPR's Don Gonyea reports, one particular word emerged as a primary element of the White House effort.

NPR: Bush Accentuates the Positive in War Speeches