Greece in turmoil over debt plan, markets in limbo

ATHENS, Greece — Greece was in tur­moil and the world econ­omy in limbo Thurs­day as a high-stakes game of polit­i­cal brinkman­ship in Athens led Prime Min­is­ter George Papan­dreou to aban­don his explo­sive plan to put a Euro­pean res­cue deal to a referendum.