Megan J. Smith, was the 3rd Chief Technology Officer of the United States (U.S. CTO) and Assistant to the President, serving under President Barack Obama, she serves on the boards of Vital Voices Global Partnership is an American international, 501(c)(3), non-profit, non-governmental organization that works with women leaders in the areas of economic empowerment, women's political participation, and human rights, headquartered in which location?