04/02 Tue. United States Fleet departs West Coast for maneuvers in 
           Hawaiian Islands area.
04/09 Tue. Germany invades Denmark and Norway.
04/10 Wed. President, acting under the Neutrality Act of 1939, extends 
           maritime danger zone to include Scandinavian area.
04/25 Thu. Carrier WASP (CV-7) is commissioned at Boston, Mass.