Libyans celebrate in Tripoli's landamark Martyrs square on February 17, 2015 the upcoming fourth anniversary of the Libyan revolution which toppled strongman Moamer Kadhafi. Islamist militants have thrived in Libya since Kadhafi was toppled and killed in the NATO-backed 2011 uprising, with authorities struggling to contain dozens of militant groups with diverse motivations and ideologies. AFP PHOTO / MAHMUD TURKIA        (Photo credit should read MAHMUD TURKIA/AFP/Getty Images)