The delivery wars are speeding up. Amazon is launching one-hour and three-hour delivery options across the U.S., expanding the push into rapid delivery. Customers now have the ability to shop over 90,

Amazon (AMZN.O) is ramping up its speedy delivery service by offering 1-hour and 3-hour shipping in markets across the ​U.S., including Los Angeles and Chicago, in its latest efforts to ‌stave off e-c...