This combination of photos from 2013 shows, top row from left, Pedro Vega Yucra, 80, in Ayacucho, Peru; Padma Sagaram, 63, in Singapore; Hamid Mohammed, 65, in New Delhi and Ingrid Foerster, 82, in Frankfurt. In middle row from left are Sandra S. Harris, 67, in Decatur, Ga.; Nissim Pinto, 79, in Tel Aviv; Amadou Mbaye, 74, in Dakar, Senegal and Mahmoud Hussein, 75, in North Cairo, Egypt. In bottom row from left are Richard Hardick, 74, in San Diego; Paul Gresham, 75, in Decatur, Ga.; Juma Abdalla Athanas, 65, in Nairobi, Kenya and Claudio Rodriguez Contreras, 71, in Havana. Across the globe, they were asked two key questions: As you grow older, what are you most afraid of? And what is the biggest problem facing the elderly in your country? (AP Photo) ( Old World Portraits Photo Essay )