The United States condemned "unprecedented" attacks by Yemeni rebels on Red Sea shipping as the Huthis pledged Tuesday to continue military operations despite the announcement of a new maritime protection force. The flurry of drone and missile attacks by the rebels, the latest of which targeted two vessels on Monday, threaten to upend global trade flows, with major shipping firms halting traffic through the Bab al-Mandeb strait. Pentagon chief Lloyd Austin warned Tuesday that the attacks "threaten" the free flow of commerce, a day after he announced a multinational task force to quell Houthi missile and drone attacks. As Yemen rebels vow to keep up Red Sea attacks, defying US warnings, FRANCE 24's Annette Young is joined by Hilary INGHAM, Professor of Economics in the Department of Economics at Lancaster University.