The deaths of U.S. service members after Iran attacked a base in Jordan followed a week of fighting that has steadily upped the ante and could trigger the resumption of all-out war.
The U.S. military has reinstated a naval blockade and bombed Iran for several consecutive days, concentrating attacks on coastal areas near the Strait of Hormuz. But airstrikes have recently extended to infrastructure, such as railways that could be used to ferry weapons.
