Israel has said the goal of its aerial bombardment of Iran is to take out the country's nuclear facilities. It wants U.S. help.

Shapiro served as Deputy Assistant Secretary of Defense for the Middle East until January—charged with, among other things, considering scenarios in which tensions between Israel and Iran escalated into all-out war and preparing U.

Lawmakers are introducing resolutions aimed at preventing the U.S. from getting involved with Israel's military campaign against Iran.