Excerpt: On its face, a drive to force public pension funds to halt investment in companies operating in countries believed to be sponsors of terrorism - primarily Iran - is in full swing.... But the three-year-old divestment movement has had only 'limited success' so far, admits lead advocate Christopher Holton of the Center for Security Policy, a conservative think tank in Washington, D.C. Not a single state has passed legislation, and only two state funds have taken any action.