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President and CEO of Yahoo, Marissa Mayer, arrives for the Time 100 gala celebrating the magazine's naming of the 100 most influen... Credit: Reuters

Indra Nooyi, Chairman and CEO of PepsiCo, takes part in a conversation on leadership, legacy and life at the Women's Conference 20... Credit: Reuters

IBM Chairwoman and CEO Virginia "Ginni" Rometty speaks at an IBM Watson event in lower Manhattan, New York January 9, 2014. IBM s... Credit: Reuters

Janet Yellen, President Barack Obama's nominee to lead the U.S. Federal Reserve, is sworn in to testify at her U.S. Senate Banking... Credit: Reuters

Brazil's President and Workers' Party (PT) presidential candidate Dilma Rousseff reacts during a news conference in Brasilia Octob... Credit: Reuters

General Motors CEO Mary Barra purses her lips before beginning her testimony before a House Energy and Commerce Oversight and Inve... Credit: Reuters

Melinda Gates, Co-chair of the Bill & Melinda Gates Foundation, smiles during a news conference before her address to the 67th Wor... Credit: Reuters

Facebook Chief Operating Officer Sheryl Sandberg delivers a keynote address at Facebook's "fMC" global event for marketers in New ... Credit: Reuters

International Monetary Fund (IMF) President Christine Lagarde gestures during a news conference on the second day of the G20 Summi... Credit: Reuters

U.S. Secretary of State Hillary Clinton checks her PDA upon her departure in a military C-17 plane from Malta bound for Tripoli, ... Credit: Reuters

Susan Wojcicki, senior vice president of Ads and Commerce for Google, speaks at the garage where the company was founded on Google... Credit: Reuters

Meg Whitman, CEO of Hewlett-Packard, arrives for the first session of annual Allen and Co. conference at the Sun Valley, Idaho Res... Credit: Reuters

Petrobras Chief Executive Maria das Gracas Silva Foster smiles during a news conference in Rio de Janeiro January 29, 2015. Brazil... Credit: Reuters

Argentina's President Cristina Fernandez de Kirchner attends the Southern Common Market (MERCOSUR) trade bloc annual presidential ... Credit: Reuters

South Korea's President Park Geun-hye (R) adjusts the country placeholder during the Asia-Europe Meeting (ASEM) in Milan October 1... Credit: Reuters

Beyonce looks out at the photographers as she comes backstage to pose with her award for Best Traditional R&B Performance for "Lov... Credit: Reuters

U.S. first lady Michelle Obama speaks during a visit with young Brazilians who have participated in a range of U.S.-sponsored deve... Credit: Reuters

Germany's Chancellor Angela Merkel gestures as she arrives for a two-day European leaders summit in Brussels June 18, 2009. REUT... Credit: Reuters

Talk show host and businesswoman Oprah Winfrey talks to journalists before the opening of the Oprah Winfrey Leadership Academy for... Credit: Reuters