The commandos

They are the most secretive and mysterious forces in the United States military. They are the brave men who take on the dangerous and unconventional missions no one else wants. They are America's elite warriors, the more than 40,000 members of the U.S. special operations forces - the Green Berets, the Navy SEALs, the Air Force commandos, the psychological operations experts, and Delta Force. Here, for the first time, is the real story behind the military's toughest, Best-trained soldiers. Newsweek journalist Douglas C. Waller was given unprecedented access to the special training that…