Spain's Unidad de Operaciones Especiales, or the Naval Special ... Saudi armed forces to plan the recapture of the mosque. 4. Israel's Sayeret Matkal is another of the world's most elite units.

Colombian special forces deal with the country's most dangerous threats, like the illegal cocaine trade. We followed how top soldiers train for deadly secret missions. More from Risky Business ...

Abu Khadija was killed by Iraqi security forces, with the support ... calling him as "one of the most dangerous terrorists in Iraq and the world." Iraq's Prime Minister Mohammed Shia al-Sudani ...

5) Israel's Sayeret Matkal is another of the world's most elite ... Saudi armed forces to plan the recapture of the mosque. 3) Russia's Alpha Group is one of the best known special forces units ...