What to know about the Houthi rebel movement, an Iran-backed group that controls much of Yemen, as the U.S. and allies retaliate for its attacks on Red Sea shipping.

A Liberian-flagged cargo ship came under fire from Houthi rebels in the Red Sea, with two on board reported to be hurt and two others missing.

Yemen’s Houthi rebels fired a missile, striking a U.S.-owned ship, less than a day after they targeted an American destroyer in the Red Sea.

The attacks on commercial ships in the Red Sea by Yemen's Iran-backed Houthi rebels have rerouted trade away from a crucial corridor for consumer goods and energy supplies.