Nifty Fifty Speaker Marcia McNutt

Overseeing the U.S. Geological Survey (USGS) - the country's largest water, earth and biological scientific and civilian mapping agency -- seems a natural fit for Marcia McNutt. She's a Navy Seals-trained underwater demolition and explosives expert, earthquake scientist, avid lover of the ocean -- and a leading geophysicist who brings vast academic and scientific background to her post. As the first woman director of the USGS in the agency's 131-year history, Marcia was nominated to the post by President Obama in 2009 and later approved by the Senate to head USGS's mission of serving as…