9 2 0 ), ▁who ▁would ▁become ▁school ▁command ant ▁several ▁years ▁later . ▁ ▁Following ▁his ▁completion ▁of ▁the ▁course , ▁Old s ▁was ▁invited ▁in ▁July ▁ 1 9 2 8 ▁to ▁become ▁an ▁instruct or ▁at ▁A CT S . ▁In ▁the ▁next ▁class ▁was ▁ 1 st ▁L t . ▁Kenneth ▁N . ▁Walker , ▁who ▁had ▁also ▁been ▁a ▁Mitchell ▁a ide , ▁and ▁in ▁ 1 9 2 9 ▁he ▁too ▁became ▁an ▁A CT S ▁instruct or . ▁ ▁T ogether ▁they ▁served ▁as ▁the ▁Bomb ard ment ▁Section ▁of ▁the ▁A CT S ▁fac ulty . ▁Between ▁ 1 9 2 9 ▁and ▁ 1 9 3 1 , ▁when ▁the ▁school ▁moved ▁from ▁Lang ley ▁to ▁Max well ▁Field , ▁Alabama , ▁they ▁were ▁responsible ▁for ▁the ▁asc end ancy ▁of ▁bomb ard ment ▁( which ▁existed ▁mainly ▁in ▁theory ▁and ▁und e velop ed ▁technology ) ▁over ▁purs uit ▁as ▁the ▁primary ▁emphas is ▁of ▁both ▁the ▁A CT S ▁curr icul um ▁and ▁the ▁development ▁of ▁Air ▁Corps ▁doctrine . ▁Hay wood ▁S . ▁Hans ell , ▁who ▁with ▁Old s , ▁Walker , ▁and ▁six ▁others ▁would ▁become ▁a ▁cli que ▁known ▁as ▁the ▁" B om ber ▁M af ia ," ▁wrote ▁of ▁them : ▁ ▁Bob ▁Old s ▁and ▁Ken ▁Walker ▁together ▁were ▁danger ously ▁close ▁to ▁being ▁a ▁" crit ical ▁mass ." ▁Both ▁were ▁almost ▁explos ively ▁inten se ▁and ▁dynamic . ▁Under ▁them ▁the ▁Bomb ard