Supporters of opposition presidential candidate Macky Sall gather outside his campaign headquarters in anticipation of his electoral victory, in the Mermoz neighborhood of Dakar, Senegal Sunday, March 25, 2012. President Abdoulaye Wade conceded defeat to his former protege Sall late Sunday, congratulating him several hours after polls closed when preliminary results showed the opposition candidate had trounced the 85-year-old incumbent. (AP Photo/Tanya Bindra)