In the United States Air Force, Airman (Amn) is the second lowest enlisted rank, just above
Airman Basic and below
Airman First Class. An Airman Basic is typically promoted to Airman after six months, or if the trainee had 2 years of JROTC, or 20 college credit hours. An Airman's duties include adjusting to military life and becoming proficient in their Air Force specialty. Because of their lone stripe, an Airman is often nicknamed "Mosquito Wings," "Wingnut," or simply "One-Striper."
