. ▁As ▁the ▁activ ists ▁did ▁so , ▁many ▁of ▁them ▁ch anted ▁" AD A ▁now ", ▁and ▁" V ote , ▁Now ". ▁ ▁Some ▁activ ists ▁who ▁remained ▁at ▁the ▁bottom ▁of ▁the ▁steps ▁held ▁signs ▁and ▁y elled ▁words ▁of ▁encourag ement ▁at ▁the ▁" Cap it ol ▁C raw lers ". ▁Jenn ifer ▁Ke el an , ▁a ▁second ▁gr ader ▁with ▁c ere br al ▁p als y , ▁was ▁vide ot aped ▁as ▁she ▁pulled ▁herself ▁up ▁the ▁steps , ▁using ▁mostly ▁her ▁hands ▁and ▁arms , ▁saying ▁" I ' ll ▁take ▁all ▁night ▁if ▁I ▁have ▁to ." ▁This ▁direct ▁action ▁is ▁reported ▁to ▁have ▁" in con ven ien ced " ▁several ▁sen ators ▁and ▁to ▁have ▁pushed ▁them ▁to ▁appro ve ▁the ▁act . ▁While ▁there ▁are ▁those ▁who ▁do ▁not ▁attribute ▁much ▁overall ▁importance ▁to ▁this ▁action , ▁the ▁" Cap it ol ▁C raw l " ▁of ▁ 1 9 9 0 ▁is ▁seen ▁by ▁some ▁present - day ▁dis ability ▁activ ists ▁in ▁the ▁United ▁States ▁as ▁a ▁central ▁act ▁for ▁encourag ing ▁the ▁A DA ▁into ▁law . ▁ ▁Final ▁passage ▁ ▁Senator ▁Tom ▁H ark in ▁( D - IA ) ▁author ed ▁what ▁became ▁the ▁final ▁bill ▁and ▁was ▁its ▁chief ▁spons or ▁in ▁the ▁Senate . ▁H ark in ▁delivered ▁part ▁of ▁his ▁introduction ▁speech ▁in ▁sign ▁language , ▁saying ▁it ▁was ▁so ▁his ▁de af ▁brother ▁could ▁understand . ▁ ▁On ▁signing ▁the ▁measure