[00:00.00]Five years ago, two of the largest auto manufacturers, GM and Chrysler, were on the brink. 
[00:06.36]The Bush and Obama administrations offered them critical lifelines of cash, tens of billions of dollars, most of which has since been repaid.
[00:14.67]In the wake of the crisis, carmakers said they would change the kinds of vehicles they were selling, reducing their size and increasing fuel-efficiency. 
[00:22.58]And, to some extent, that is happening.
[00:24.53]But, in Detroit this week, the industry also returned to some of its old high-powered old form.
[00:30.56]Hari is back with that story.
[00:33.25]Ladies and gentlemen, introducing the big nasty, the 2015 Corvette Z06.
[00:42.68]Detroit puts its best new offerings on stage each year at the North American International Auto Show, 
[00:49.39]previewing concept cars that may never be made, alongside those that car-lovers can expect to see in showrooms in the coming years.
[00:57.46]Vice President Joe Biden was among the enthusiasts today as Chevrolet rolled out the new Corvette.
[01:03.40]Now, you know, that old Corvette, that rear end, it wasn't what you would call stable, right?
[01:09.18]But they tell me this new one, man, can take the Porsche. I'm counting on it.
[01:14.51]And automakers seem to be counting on a new yearning for high-performance cars, after focusing more on smaller sedans and electric vehicles in recent years.
[01:24.31]There you have it.
[01:25.65]Trucks are also moving off dealers' lots. And at the auto show, manufacturers tried to spotlight redesigned models like Ford's F-150, which are lighter and more fuel-efficient.
[01:35.95]Overall, as much as 700 pounds of weight have been saved, helping the F-150 tow more, haul more, accelerate quicker, stop shorter, all with better gas mileage.
[01:47.30]Ford and its competitors are racing to meet a surging demand for trucks, fueled partly by contractors buying more as them, as the housing industry picks up.
[01:57.06]The new CEO of General Motors, Mary Barra, unveiled her company's new midsize pickup, the GMC Canyon, on Sunday.
[02:03.67]At today's GM, our products are the result of putting the customer at the center of everything we do.
[02:11.64]Overall, the industry racked up strong sales gains in 2013, with more than 15 million vehicles sold. 
[02:18.21]It's hoping to build on that performance in 2014.