▁previous ▁discovery ▁of ▁the ▁' D ead ▁Sea ▁Scroll s ' ▁in ▁the ▁Q um ran ▁C aves ▁( above ▁the ▁north west ▁shore ▁of ▁the ▁Dead ▁Sea ) ▁by ▁Bed ou in ▁she ph erd s , ▁becomes ▁known . ▁ ▁April ▁ 1 ▁ ▁Jack ie ▁Robinson , ▁the ▁first ▁African ▁American ▁in ▁Major ▁League ▁Baseball ▁since ▁the ▁ 1 8 8 0 s , ▁signs ▁a ▁contract ▁with ▁the ▁Brook lyn ▁D od gers . ▁ ▁King ▁George ▁II ▁of ▁Greece ▁is ▁succeeded ▁by ▁his ▁brother ▁Paul . ▁ ▁The ▁ 1 9 4 7 ▁Royal ▁New ▁Zealand ▁Navy ▁mut in ies ▁begin . ▁ ▁April ▁ 4 ▁– ▁The ▁International ▁Civil ▁A viation ▁Organ ization ▁begins ▁operations . ▁ ▁April ▁ 7 ▁ ▁The ▁Arab ▁Ba ' ath ▁Party ▁is ▁established ▁by ▁mer ger ▁in ▁Dam asc us . ▁ ▁Ed av ille ▁Rail road ▁opens ▁in ▁Massachusetts , ▁as ▁the ▁first ▁railway ▁theme ▁park . ▁The ▁largest ▁recorded ▁sun spot ▁group ▁appears ▁on ▁the ▁solar ▁surface . ▁ ▁April ▁ 9 ▁▁ ▁Multiple ▁torn ado es ▁strike ▁Texas , ▁Oklahoma ▁and ▁Kansas , ▁killing ▁ 1 8 4 ▁and ▁inj uring ▁ 9 7 0 . ▁ ▁The ▁J our ney ▁of ▁Re con c ili ation ▁begins , ▁organized ▁by ▁the ▁Congress ▁of ▁Ra cial ▁Equ ality . ▁ ▁April ▁ 1 5 ▁– ▁Jack ie ▁Robinson ▁becomes ▁the ▁first ▁African ▁American ▁to ▁play ▁Major ▁League ▁Baseball ▁since ▁the ▁ 1 8 8 0 s . ▁