Your sighting reports:

Subject: Ufo sighting
Date: April 26, 2008
From: [Firstname] [NAME] [name]@hotmail.fr

Hello,

I observed a strange phenomenon Friday, April 25, in Tours in company of a friend. We were in the center of the city, and some other people than us who looked up, seemed quite puzzled by what they saw.

In the neighbourhoods of 07:15 p.m., I looked up in the direction of the north while returning home. In the axis of the street, I saw a form a priori triangular high in the sky. The object, black, paradoxically reflected the sun in an important manner. Progressively with the observation, I realized that the object seemed to drift towards the south-eastern south. I thus started to think of a weather balloon. But the photographs of sounding balloons that I looked at left doubtful: they do not resemble at all what I saw. I called the friend whom I had just left and who had returned home a few hundreds of meters lower in the street. Ordering him to come outside with his video camera, I hoped that he could film and zoom so as to get a more precise idea of the shape of the thing. We are not disappointed by the result. It seems that the object, after visualization, has the shape of a carton. It continued to derive before disappearing, at the end of approximately half an hour.

Additional detail, a website mentions a similar observation on Tours, on April 15.

I do not know if I appear credible. My name is [Firstname] [Name], I am 26 and I am titular of Master in history. Did anybody see a similar thing? Can somebody provide a rational explanation to me, knowing that an important air base occupies the very near Tours urban area?