The big three automakers are back in front of congress for the first of two days of tense hearings.GM, Ford and Chrysler are asking for billions in loans to keep them afloat.Fox's Craig Boswell reports from Washington.CEO's from the big three arrived on Capitol Hill in new model hybrid vehicles, a symbolic pr move.Last month, they were criticized for arriving in private jets to ask congress for money.Wagoner says, "We are here today because we made mistakes."While striking a more humble tone, some senators remain skeptical because the request has grown from 25 to 34 billion dollars.Schumer says: "I worry that if they're on their own, they will be back a short time later, asking for more."Automakers provided lawmakers with detailed reorganization plans that include a government board to oversee the bailout.All three have specific dollar requests.GM says it needs four billion immediately.Nardelli says: "Chrysler is requesting a seven billion dollar loan."Mulally says: "Specifically, Ford requests access to 9-billion in bridge financing."The united auto workers president says the union will continue to make concessions but...Gettelfinger says, "The UAW vigorously opposes any attempts to make the workers and retirees the scapegoats."While some senators support the bailout it still boils down to the bottom line.Dodd says: "Ultimately none of this works until consumers buys cars."Critics remain unconvinced.Shelby says, "34 billion is probably just the beginning, is that correct? I think that's a high probability."Boswell says, "The automakers all agree that consumers will not buy their cars if they go into a preplanned bankruptcy. Company executives face a house panel tomorrow. Congress is trying to determine if they will take up the package in a lame duck session next week. In Washington, Craig Boswell, Fox News."