Amazon plans to bring same-day prescription delivery to 20 more cities next year, the company said Wednesday, marking the latest phase of its push into health care.As part of the expansion, which will make speedy medicine delivery available in nearly half of the U.S., Amazon said, it is embedding pharmacies in same-day delivery facilities often clustered around major metro areas. The company announced its plans during a press event at one of its warehouses near Nashville, Tennessee.Amazon in March introduce ...