What are the 3 top foreign terrorist organizations that pose the greatest threat to the United States?
1. Al Quaeda
The rest:
Abu Nidal Organization (ANO)Abu Sayyaf Group (ASG)Armed Islamic Group (GIA)Aum ShinriykyoBasque Fatherland and Liberty (ETA)Gama'a al-Islamiyya (Islamic Group, IG)HAMAS (Islamic Resistance Movement)Harakat ul-Mujahidin (HUM)Hizballah (Party of God)Japanese Red Army (JRA)al-JihadKachKahane ChaiKurdistan Workers' Party (PKK)Liberation Tigers of Tamil Elam (LTTE)Mujahedin-e Khalq Organization (MEK, MKO, NCR, and many others)National Liberation Army (ELN)Palestine Islamic Jihad-Shaqaqi Faction (PIJ)Palestine Liberation Front-Abu Abbas Faction (PLF)Popular Front for the Liberation of Palestine (PFLP)Popular Front for the Liberation of Palestine-General Command (PFLP-GC)al-Qa'idaRevolutionary Armed Forces of Colombia (FARC)Revolutionary Organization 17 November (17 November)Revolutionary People's Liberation Army/Front (DHKP/C)Revolutionary People's Struggle (ELA)Shining Path (Sendero Luminoso, SL)Tupac Amaru Revolutionary Movement (MRTA)Definition of Terrorist Activity Used in These Designations
See here: http://www.state.gov/s/ct/rls/rpt/fto/2801.htm
All the best,