What's wrong with my Linq to XML/Objects query?

I'm trying to query a weather service and find the weather conditions at nearby airports.

Here is the XML: http://ift.tt/1ndQyCx

    var document = XDocument.Load("http://ift.tt/1ndQyCx");

    var airports =
        from airport in
            document.Descendants("response")
                .Descendants("location")
                .Descendants("nearby_weather_station")
                .Descendants("airport")
                .Descendants("station")
        select
            new Airport((string) airport.Element("city"), (string) airport.Element("state"),
                (string) airport.Element("country"), (string) airport.Element("icao"),
                (double) airport.Element("lat"), (double) airport.Element("lon"));

    foreach (var airport in airports)
    {
        Console.WriteLine(airport.City);
    }
    Console.WriteLine(airports.Count());

But I am not getting anything printed to the console at all, and the airports.Count() always returns 0. What am I doing wrong?