The Special Tribunal for Lebanon was set up by the United Nations at the Lebanese government's request to try the alleged perpetrators of the 2005 bombing in which former PM Hariri and 21 others were killed. The suspects - Mustafa Amine Badreddine, a senior Hezbollah figure and brother-in-law of slain Hezbollah commander Imad Moughniyeh, Salim Jamil Ayyash, Hussein Hassan Oneissi and Assad Hassan Sabra - remain at large.