Yemen's Houthi rebels have entered the escalating Middle East conflict, threatening global shipping in the Red Sea.

Yemen's Iran-backed Houthi rebels have entered the escalating war in the Middle East, claiming two missile launches at Israel. Their involvement in the monthlong conflict could further hurt global shipping should they again target vessels in the Bab el-Mandeb Strait off the Red Sea, a narrow waterway that has become all the more vital since Iran effectively shut the Strait of Hormuz.