Special forces have long been integral to amphibious ... Chinese military manuals suggest that these elite forces would perform the most dangerous missions that start before the main landings.

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 ...

USSOCOM is guided by the "SOF Truths," the fifth of which states "most special ... conventional forces, which could lead to mission failure. Furthermore, the term "elite" is dangerous because ...