A group of Russians detained by the police in a part of northern Chad where the army has been battling a rebel invasion from Libya said that they were tourists who had come to sightsee in the Sahara Desert. The roughly 10 Russians were picked up last week by the police near the town of Faya Largeau because they were in a military operational zone, according to national police spokesperson Amane Issac Azina. Azina said they had not broken any laws and had not been arrested, but rather evacuated to the capital N'Djamena for their own safety. "We decided this…