An Islamist terrorist cell planned several attacks in Cologne, Vienna, and Madrid. Christmas church services could have been the target, reports Focus Online. In this regard, several arrests were made in Germany and Austria. A sniffer dog is being used to search for explosives in Cologne Cathedral. “Due to the current threat assessment of the Office for the Protection of the Constitution and the still elevated terrorist alert level, there is an overall increased risk during the Christmas holidays in Austria”, the Vienna police said in a statement. The police added that security measures have b…