We will use Ramanujan graphs to show that all SL(2,Fq) can be made simoltnously expanders (for all prime powers q). Then Ramanujan complexes are used to make all SL(n,Fq) expanders (all n and all q). Togther with the work of Kassabov and Nikolov it leads to a proof that all non abelian finite simple groups (with the possible exception of the Ree groups) are uniformly expanders w.r.t a bounded number of generators.