Multimedia National Public Radio offers up radio with a vision. Presenting NPR multimedia: the Picture Show blog and the Radio Pictures video podcast - quality visuals to go with NPR's quality sound.

Fairchild's first microchip combined four transistors, six resistors and their interconnecting wires onto a single sliver of silicon, in 1960. Today's microprocessors can employ more than 1 billion transistors. Fairchild/Courtesy of the Computer History Museum hide caption

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Fairchild/Courtesy of the Computer History Museum

Conservative talk show host Rush Limbaugh talks with guests at the White House in 2009. Limbaugh apologized March 3 to Georgetown University law student Sandra Fluke after he branded her a "slut" and "prostitute." Ron Edmonds/AP hide caption

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Ron Edmonds/AP