Daadab and Dollo Ado Refugee Camps were mapped in May 2012 http://www.disruptivegeo.com/2012/05/imagery-to-the-crowd-early-results/
Here are the OverPass Turbo queries to extract the buildings, roads, and POIs done during that time.
[diff:"2010-05-01T15:00:00Z","2012-07-01T15:00:00Z"];
(
// get all roads
way[highway]({{bbox}});