Not nukes, I would say. More likely a directed-beam weapon. Should be possible to triangulate from damaged areas and shaded areas to pinpoint the location in the sky of each attack. I wonder how the age of this damage relates to the age of the so-called "green glass" layers found in archaeological digs around the world, or the age of the destruction of the 7 cities in India. I don't consider myself part of the UFO crowd, but I do think we need to come to terms with the worldwide evidence of a big war.