A few years ago it seemed the only momentum Buick had was downhill. In fact, several auto industry pundits called for the elimination of the brand as General Motors reorganized. But Buick survived the tumult within GM and has emerged stronger than it has been in over a decade. A hot-selling new LaCrosse and the imminent arrival of the Buick Regal are two reasons why Buick marketing head Craig Bierley is feeling so confident these days. We had a chance to speak with him about the resurgent brand at the 2010 New York International Auto Show.