In a desperate, collective plea for up to $38 billion in government aid, executives from Detroit’s Big Three automakers told a Senate committee on Thursday they would start to crank out smaller, more fuel-efficient cars and streamline their businesses to stay afloat. “Now we are absolutely committed to exceeding our customers’ expectations for quality, fuel-efficiency, safety, and affordability,” said Ford’s chief executive Alan Mulally. The execs made similar pleas to members of the House of Representatives on Friday.