Quick question about the airport at Charlotte. What are the thresholds for weather impact? We're connecting on Thursday for a cruis eout of San Juan, PR and see that a little snow is forecast. Up here a couple inches are nothing but I know from living in other places a little can really goof things up. The weather service down there is saying morning commute Thursday could be impacted so what about the airport? How much does it take to cause delays down there?