Cant get attributes of an xml element properly

Im trying to get the attributes value of this yahoo weather XML element:

<yweather:wind chill="24" direction="340" speed="28.97" /> 

like this:

XDocument XResult = XDocument.Parse(e.Result);

XElement location = XResult.Elements(XName.Get("wind", "yweather")).FirstOrDefault();

XAttribute city = location.Attributes(XName.Get("chill")).FirstOrDefault();
XAttribute direction = location.Attributes(XName.Get("direction")).FirstOrDefault();
XAttribute speed = location.Attributes(XName.Get("speed")).FirstOrDefault();

but it tells me object not set to an instance..