ADVANCE FOR USE MONDAY, JULY 25, 2011 AND THEREAFTER – In this Thursday, July 14, 2011 photo, children play soccer in front the “Maine” building in Havana. Fifty years after Fidel Castro’s revolution froze property transactions, a severe housing crisis has stubbornly resisted repeated government attempts to fix the problem. But President Raul Castro has pledged to legalize the purchase and sale of homes by the end 2011, bringing the informal market out of the shadows. (AP Photo/Javier Galeano)