As the U.S. weighs the option of heading back into a war in the Middle East, here are some ways the attack could play out.

The U.S. military has moved some aircraft and ships from bases in the Middle East that may be vulnerable to any potential Iranian attack, two U.S. officials told Reuters on Wednesday. The moves come as President Donald Trump kept the world guessing whether the United States would join Israel's bombardment of Iran's nuclear and missile sites,