An article on the Smithsonian magazine website features the "Air Raid" video.
This has been around since February but Doro just discovered it.
They wrongly attribute the kats to Hannover instead of Freiburg though.
For those who haven't heard of "Smithsonian": Smithsonian magazine is a monthly magazine created for modern, well-rounded individuals with diverse interests. It chronicles the arts, history, sciences and popular culture of the times. Each subscription includes a complimentary membership to the Smithsonian Institution. The printed version has a circulation of ca. 2 million (too bad that isn't where the kats are :)
The institution itself is "an establishment for the increase and diffusion of knowledge among men" founded from the will of British scientist James Smithson in 1846 (it is however a US foundation. It seems Smithson was fed up with British society of his time). In practice the institution runs several museums (including many very well known ones in Washington DC) and funds research. Establishment from the funds of Smithson was carried out by Congress and so it is associated with the US federal government.
Probably one of the best known museums run by the institution is the National Air & Space Museum, which has pretty much everything that has ever flown (or attempted to). That is also one I have personally visited.