Final answer:
The Delta Force is a highly classified unit, and while its exact training and operations are not publicly disclosed, some general information about their training process is known. The statement that 'no one' understands the training is an exaggeration.
Step-by-step explanation:
The statement "The Delta Force is highly classified and no one really understands what is involved in the training" is partially true. The Delta Force, formally known as 1st Special Forces Operational Detachment-Delta (1st SFOD-D), is a special mission unit of the United States Army and is indeed highly classified. While the exact details of their operations and training are not publicly disclosed to protect their methods and operations, some information about the general process and types of training they undergo is available to the public. The statement that "no one" understands the training is an overstatement, as surely the members of Delta Force and associated military personnel have an understanding of it. Nevertheless, the rigorous selection process and training are known to include physical fitness, marksmanship, and specialized combat skills preparation.