1: But it would be an extraordinary step and certainly not a foregone conclusion that the U.S . would attempt to board an Iranian ship if it entered Yemeni waters , U.S . officials said . 2: U.S . warships from the carrier group of the Roosevelt are joining allied vessels from Saudi Arabia , Egypt and other partner nations prepared to intercept a convoy of seven to nine Iranian vessels believed headed for Yemen . 3: U.S. , allied ships prepared to intercept Iranian vessel if they enter Yemen 's waters .
1: attempt to board an Iranian ship 2: intercept a convoy of seven to nine Iranian vessels 3: intercept Iranian vessel