In December 2009, on the day that President Obama accepted his Nobel Peace prize here in Norway, the following spirals appeared in the skies near Tromsø (real amateur footage):
and
Then, sometime after the spiral, this appeared in the same position:
There have been many, many theories on what has been happening - HAARP, a failed Russian rocket launch - but here is the most interesting explanation, taking into consideration these anomalies have now been seen all over the world:
http://www.youtube.com/watch?v=IhiPmVHAuTA&feature=player_detailpage
Finally, here is another example from Australia:
