This photography have been took over L.A in februrary 25 1942.
The anti-aircrafts guns have tryed to shot down this UFO for 2 hours. ( Top speed 100 km/h --> 62.5 miles/hours ). This UFO was hitted by the AAG, but
he didn't have to suffer from any damages.
Others UFO, less huge than this one, were flying in the sky and eluding the AAG.
It seems that they had a 20.000 km/h ( 12.500 Miles/hours ) top speed.