This is where drill instructors come from

Drill Instructor School is tasked with training the Marines that make Marines.

Lasting 11 weeks, the school is considered to be 10 times harder than boot camp. Each training class starts with 60 students, but there is a 15 to 20 percent dropout rate — mostly due to injuries.

Those that complete the grueling process are granted the 0911 MOS, and will go on to serve in one of the most legendary jobs in the U.S. military...as well as the nightmares of more than a few recruits.