agan ▁did ▁so ▁on ▁July ▁ 1 3 , ▁ 1 9 8 5 , ▁when ▁he ▁under w ent ▁colon ▁cancer ▁surg ery ▁while ▁under ▁an est hes ia . ▁Vice ▁President ▁George ▁H . ▁W . ▁Bush ▁dis charg ed ▁the ▁powers ▁and ▁duties ▁of ▁the ▁presiden cy ▁during ▁his ▁in cap acity , ▁serving ▁as ▁acting ▁president ▁until ▁later ▁that ▁day , ▁when ▁Re agan ▁rec laimed ▁his ▁authority . ▁The ▁next ▁to ▁do ▁so ▁was ▁President ▁George ▁W . ▁Bush , ▁who ▁under w ent ▁a ▁colon os copy ▁procedure ▁on ▁June ▁ 2 9 , ▁ 2 0 0 2 , ▁and ▁again ▁on ▁July ▁ 2 1 , ▁ 2 0 0 7 . ▁Vice ▁President ▁Dick ▁Chen ey ▁tempor arily ▁became ▁acting ▁president ▁on ▁both ▁occasions . ▁ ▁List ▁of ▁acting ▁pres idents ▁under ▁the ▁ 2 5 th ▁Am end ment ▁ ▁See ▁also ▁▁ ▁United ▁States ▁president ial ▁line ▁of ▁succession ▁ ▁United ▁States ▁president ial ▁line ▁of ▁succession ▁in ▁fiction ▁ ▁References ▁▁ ▁* ▁Category : Un ited ▁States ▁president ial ▁succession ▁Category : V ice ▁Pres iden cy ▁of ▁the ▁United ▁States ▁Category : Tw enty - fif th ▁Am end ment ▁to ▁the ▁United ▁States ▁Constitution <0x0A> </s> ▁The ▁Silver ▁Be aver ▁Award ▁is ▁the ▁council - level ▁distinguished ▁service ▁award ▁of ▁the ▁Boy ▁Sc outs ▁of ▁America . ▁ ▁Upon ▁nom ination ▁by ▁their ▁local ▁Sc out ▁council ▁and ▁with ▁the ▁appro val ▁of ▁the ▁National ▁Court ▁of ▁Honor ,