Wisconsin Air National Guard Staff Sgt. Jeff Julius, center, threads a small pipe during a 366th Training Squadron water and fuel systems maintenance course with the assistance of Wisconsin Army National Guard Private 1st Class Sean Kostuch and Buffalo, New York-native Airman Eric Nelson. Airmen, Sailors and Soldiers attend the course but graduate at different points of training depending on the training requirements of each service. Soldiers graduate after the fourth block of training and Sailors complete their requirements after five blocks. Airmen attend the entire 12-block, 72-day course. (U.S. Air Force photo by John Ingle)