WASHINGTON (AP) - The Obama administration plans to end the popular $3 billion Cash for Clunkers program on Monday, giving car shoppers a few more days to take advantage of big government incentives. The Transportation Department said Thursday the government will wind down the program on Monday at 8 p.m. EDT. Car buyers can receive rebates of $3,500 or $4,500 for trading in older vehicles for new, more fuel-efficient models. "It's been a thrill to be part of the best economic news story in America," Secretary Ray LaHood said in a statement.