The man who held up an eastern Iowa bank last week may be making a career of it.Davenport police have identified the bank robber who told a teller he was carrying an envelope of anthrax. He held up the Quad City Bank and Trust branch last Tuesday. Using security camera tape, police say he’s 52-year-old Douglas Poling, an Ohio man who lived in Davenport for a time. He also goes by the name Douglas Garling and is a suspect in several other bank robberies in several other Midwestern states.