Greece votes in referendum with future in euro in doubt

Greece votes on Sunday on whether to accept more austerity in exchange for international aid, in a high-stakes referendum likely to determine whether it leaves the euro-currency area after seven years of economic pain.     Staged against a backdrop of shuttered banks and threats of financial apocalypse, the vote is too close to call and may not produce the clear mandate for negotiations that Athens’ creditors seek.     Greeks are split on whether to accept an offer by creditors that Prim