. >> mediacom supports c-span as a public service, along with these other television providers, giving you a front-row seat to democracy. >> the house committee investigating the january 6 attack on the u.s. capitol holds its first hearing tuesday. officers from the u.s. capitol police and washington metropolitan police department will tell members what they saw and experienced on that day. watch the hearing live tuesday beginning at 9:30 eastern on c-span3, online at c-span.org, or listen with the free c-span radio app. >> president biden and vice president harris marked the 31st anniversary of the americans with disabilities act, which was signed into law on july 26, 1990,