Iran launched an attack on the U.S. Al Udeid Air Base in Qatar on Monday, two days after the U.S. struck three nuclear sites in Iran.Explosions were heard in Qatar, multiple news agencies reported, and photos showed missiles over Qatar's capital city,

WASHINGTON (AP) — Iran retaliated Monday for the U.S. attacks on its nuclear sites by targeting Al Udeid Air Base, a sprawling desert facility in Qatar that serves as a main regional military hub for American forces. A U.S. defense official says no casualties have been reported.

Prior to attack on biggest US military base in Middle East, US had already started taking ‘force protection’ measures.