The April 11 meeting will mark the first time the coalition will gather without America’s secretary of defense participating.
The U.S. continues to strike Houthi militants, who have targeted Israel and American ships in the region.
“Whether we’re going to make the Houthis cry for mercy anytime soon is extremely unlikely,” one expert on Yemen said.
President Donald Trump has said Caine wore the hat and expressed political support during a 2018 visit to Iraq.
