U.S. President Donald Trump initially distanced himself from Israel’s surprise attack on Friday that triggered the conflict, but in recent days has hinted at greater American involvement, saying he wants something “much bigger” than a ceasefire.

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.

Israeli strikes on Natanz, Fordow and Isfahan pose little regional radiation risk but could release plumes of toxic chemicals, experts said.