In our other top story:The CEOs of the Big 3 learned their lesson the hard way in November when they flew to the Capitol in private jets to ask for billions of dollars in government aid...This time, they're driving and they're arriving with plans explaining what they'd do with the money they're asking for...Susan Roberts reports from Washington.There is no plan B.That's the word from auto executives -- as they prepare to plead with Congress for a big bailout. G-M, Ford, and Chrysler are asking for as much as 34-billion dollars to keep America's auto industry in gear.In exchange for the cash -- the Big Three are promising to slash costs, fold brands, and rush more fuel-efficient cars onto dealer lots.Detroit will also cut executive pay. If Congress says yes to the bailout -- all three CEOs will be making one dollar per year.The largest automaker GM is worse off, it says it needs 12 billion dollars, and if it doesn't get 4 billion immediately it will collapseGM President Fritz Henderson says, ''Like any business, we've made mistakes and it's our job to make sure we correct and fix them.''Right behind is Chrysler which says it needs 7 billion by the end of the month to stay in businessFord is asking for 9-billion - but, says it may not need the money unless the economy gets worse.Tomorrow, lawmakers will grill the CEOs about their future business plans. And, they'll question the head of the United Auto Workers union about how 'his' group can help cut costs.Tonight, union leaders are set to meet with representatives from the automakers. They're talking about giving back some benefits including a program that lets laid off workers continue to collect most of their paychecks.Even if the big three get their multi-billion dollar bailout -- there will be widespread job cuts in the auto industry... As Detroit tries to become greener -- and leaner.Susan Roberts, CBS News, Washington.