begin t. group is claiming responsibility form a series of attacks last weekend in the north that killed more than 200 people. the u.s. republican party presidential kanld dats faced off in the final debate in the u.s. state of florida. newt gingrich quickly fired the shot at miss romney over his immigration policies. both candidates have relentlessly attacked each over in the media in the past few days. a frightening day for australia s prime minister left unanswered questions about her security. activists surged on a restaurant where she was attending an event. police decided to rush the prime minister to safety. those are the top stories from cnn, the world s news leader. i m zain verjee and world business today starts now. hello and welcome to world business today, happy friday to all of you out there. i m nina dos santos in london. from cnn hong kong, i m pauline choiu. i m john deaf tar yoes in switzerland, the top stories on january 27th. nearly a quart