US Navy SEALs(AP)

The U.S. Navy SEALs typically operate under the radar, but the killing of the world's most notorious terrorist, Osama bin Laden, put the elite soldiers in the spotlight. The soldiers are deployed to carry out the world's toughest jobs. The Navy SEALs are hardcore - but are they the 'best of the best'?

We take a look at the most dangerous special forces units in the world.