A Houthi drone boat packed with explosives detonated in the Red Sea on Thursday but failed to cause any damage or casualties. The Iran-aligned Houthis, who control much of Yemen, have launched wave after wave of exploding drones and missiles at commercial vessels since Nov. 19, trying to inflict a cost in what they say is a protest against Israel's military operations in Gaza. The Houthi campaign has been extraordinarily disruptive to international shipping, causing some companies to suspend transits through the Red Sea and instead take the much longer, costlier journey around Africa.