New York City is halting a $9.6 million incentive package offered to Aetna to move its headquarters to the city. The insurance giant announced in June that it would move its headquarters to New York City beginning in late 2018 after nearly two centuries in Hartford, Connecticut. But those plans were put on hold after CVS Health Corp. said in December that it was buying Aetna for $69 billion in a deal that would help the drugstore chain reach deeper into customer health care and protect a key client. At that time, Aetna said all of its locations would be...