Marvin Ibo Guengoer - GES Sportfoto/Getty Images
Michael Steele/Getty Images
Bloomberg via Getty Images
AP
Santiago Mazzarovich / AFP via Getty Images
Courtesy of May Lee
David Dee Delgado/Getty Images
AP Photo/Seth Wenig
Spencer Platt/Getty Images
Sialkot, Pakistan produces most of the world's footballs, but only a select group of manufacturers hold FIFA licenses. To earn certification, factories must pass a series of demanding performance tests and pay high licensing fees.