Nagoya and Kobe. All but one of the B-25s ran out of fuel before reaching friendly forces in western China and is forced to land in Japanese-occupied China. With the support of Chinese farmers, 71 airmen reach free China. Eight airmen are captured by the Japanese – who execute four of them in retaliation for the raid. April 20 – WWII: Operation Calendar: The American aircraft carrier USS Wasp, escorted by the British battlecruiser HMS Renown, two cruisers and six destroyers, brings 47 planes (Spitfires) to Malta. They are successfully delivered – but 30 of them are immediately destroyed on the ground by German bombers. Within 48 hours all planes are destroyed. April 23 WWII: Exeter becomes the first historic English city bombed as part of the Baedeker Blitz, in retaliation for the British bombing of Lübeck. Exeter-born William Temple is enthroned as Archbishop of Canterbury. April 25 – Princess Elizabeth registers for war service in the U.K. April 26 WWII: The Reichstag meets for the last time, dissolving itself and proclaiming Adolf Hitler the "Supreme Judge of the German People", granting him the power of life and death over every German citizen. A gas and coal dust explosion at Benxihu Colliery in Manchukuo kills as many as 1,549 workers, the world's all-time worst mining disaster. April 27 WWII: A national plebiscite is held in Canada on the issue of conscription. The Jewish Star of David is required wearing for all Jews in the Netherlands and Belgium; Jews in other Nazi-controlled countries have already been wearing it. April 29 – WWII: Burma campaign: Japanese forces of the 15 Army under General Shōjirō Iida capture Lashio. The allies are in full retreat. An explosion at a chemical factory in Tessenderlo, Belgium leaves 200 dead and 1,000 injured. May May – Operation Pluto: The plan to construct oil pipelines under the English Channel, between England and France, is tested in the River Medway. May 3–4 – WWII: Tulagi is invaded by Japanese forces in the British Solomon Islands of the South Pacific, as part of Operation Mo. May 5 – WWII: Battle of Madagascar (Operation Ironclad) begins when British forces land on the Vichy French colony of Madagascar. On May 7 the northern city of Diego Suarez surrenders. May 7 – WWII: On Corregidor, the last American and Filipino forces in the Philippines under command of 2LT Robert L. Obourn (92nd Coast