Winners

Americans experienced the fifth year of a national housing crisis. By the end of 2011, some four million families had lost their homes after they could no longer meet mortgage payments. People renting houses often found themselves in a similar situation, no longer able to afford the rent and facing eviction.

Fatima al-Qaws cradles her son Zayed (18), who is suffering from the effects of tear gas after participating in a street demonstration, in Sanaa, Yemen, on 15 October.