The youngest son of Sen. John McCain has joined the Marine Corps and could be deployed to a war zone in a matter of months, according to a magazine report. Jimmy McCain, 18, will begin basic training in September. He will spend three months in boot camp and undergo a month of specialized training before being assigned to a unit. "I'm obviously very proud of my son," the elder McCain told Time for a story in editions going on sale Monday, "but also understandably a little nervous." With 25,000 of 178,000 active duty Marines in Iraq now and 80,000 having done tours of duty there or in Afghanistan in recent years, the likelihood is high of Jimmy McCain being deployed to a war zone.