Google’s Marissa Mayer Becomes Yahoo’s New CEO

Yahoo! Inc. announced on Monday that it has appointed Google Inc.’s Marissa Mayer as president and Chief Executive Officer of the multinational Internet corporation, making her the fifth CEO of the struggling tech giant in five years. Mayer began her new role on Tuesday.

Marissa Mayer speaks onstage at the Fortune Most Powerful Women Dinner at the Time Warner Center on May 24, 2011 in New York City. Jemal Countess/Getty Images for Time Inc.