With Army in his past — and future — Bears LB Jon Rhattigan fights for roster spot

NASHVILLE, Tenn. — Whenever Bears linebacker Jon Rhattigan’s NFL career ends, he owes his country five years of military service. The West Point graduate doesn’t know when that day will come — or what it will look like. He's willing to do whatever is asked. He’s 27 and has a body beaten up by six years of the NFL. A geospatial information science major, Rhattigan could end up on the front lines — or not. “People look at different movies and think it’s all infantry, but there’s truly so many…