Clearly, Nokia's getting a lot of attention at CES this year, and for good reason: the Lumia 900 is in the first batch of LTE-enabled Windows Phones and the Lumia 710 launched on T-Mobile just this week, marking the company's reentrance into the hardscrabble US market. That puts Chris Weber, president of Nokia's US business, in the hot seat — and we sat down with him this week to get his thoughts on the prospects for success.