A-listers in Chicago for the launch of the Obama Foundation. There was but one French woman among the five hundred guests, the activist, essayist and journalist, Rokhaya Diallo. She shared her impressions with LIBERATION. ” When i asked myself after the presidency how could i have an impact. When i asked myself after…turning 56. It’s not too late you can still have an impact.” This question doesn’t come from just any early retiree but from he who, not so long ago, was president of the number one world power. Barack Obama organized the first meeting of the Chicago Youth Leadership Summit of…