Recent images of a Huthi parade in Yemen, held after thousands of fighters completed their military training. American and British forces have shot down 18 drones and three missiles that were launched by the Iran-backed rebels toward international shipping lanes in the Red Sea. The Huthis -- who control much of Yemen -- are part of the "axis of resistance" of groups arrayed against Israel and have been menacing and attacking ships in the Red Sea since the war in Gaza erupted in October last year. FILE IMAGES