American forces have been operating in the air, at sea, and on land to counter what Israeli military sources described as a sustained Iranian response to Israeli strikes.

Two American destroyers have launched missile interceptors over the past few days, a US official told Business Insider. Another one just arrived.

The US military is helping intercept missiles that Iran fired in retaliation at Israel, a US official says. The US has been moving assets nearer to Israel to assist in missile intercepts and to provide better protection of US bases in the region.