"Still, as the war drags on, the risk of retaliation outside the region will increase—and that risk is already very real."

"Even before images of death and destruction in Iran began flooding the internet, Western security officials had expressed concern that Iran or its proxies—Hezbollah in Lebanon, Iraqi Shia militia groups, the Houthis in Yemen—could launch attacks in the United States, Europe, or elsewhere. When Time magazine this week asked President Trump about the threat to the U.S. homeland, he said, 'I guess' Americans should be worried. 'We plan for it. But yeah, you know, we expect some things. Like I said, some people will die. When you go to war, some people will die.'..."

"What Iran Might Do When It Has Nothing to Lose/The risk of a retaliatory attack outside the Middle East is growing" (The Atlantic)(gift link).

"Iran’s retribution against the West could take three possible forms: inspired attacks, in which individuals who are radicalized by current events or Iranian propaganda decide to act on their own; directed attacks, in which Iran relies on third parties such as transnational criminal organizations; and attacks by sleeper cells, which consist of Iranian operatives or terrorist proxies deployed to Western countries years ago in order to respond in the event of a catastrophic U.S.-Iran war."