1955	Apr	18		Einstein dies
1947	Oct	4		Planck dies
1945	Sep	2		World War II ends
1945	May	16		Planck saves KWI from disbandment
1945	May	8		World War II ends in Europe
1945	Jan	23		Planck's son hanged
1942	Sep	23		Manhattan Project begins
1940				Einstein becomes US citizen
1939	Sep	1		World War II begins
1939	Aug	2		Einstein warns of potential German atomic bomb