People gather to commemorate the 50th anniversary of the disappearance of Mehdi Ben Barka in front of the Brasserie Lipp, in Paris' St Germain neighborhood, on October 29, 2015. Barka was a Moroccan politician, head of the left-wing National Union of Popular Forces (UNFP) and secretary of the Tricontinental Conference. An opponent of Hassan II, he "disappeared" in Paris in 1965. Sign reads, "Truth and Justice for Mehdi Ben Barka". AFP PHOTO/FRANCOIS GUILLOT (Photo credit should read FRANCOIS GUILLOT/AFP/Getty Images)
