Valley of the Kings rains. There is currently little year-round rain in this part of Egypt, but there are occasional flash floods that hit the valley, dumping tons of debris into the open tombs. The quality of the rock in the Valley is inconsistent, ranging from finely-grained to coarse stone, the latter with the potential to be structurally unsound. The occasional layer of shale also caused construction and conservation difficulties, as this rock expands in the presence of water, forcing apart the stone surrounding it. It is thought that some tombs were altered in shape and size depending on the types of rock the
Victims of Terrorist Attack on the Pentagon Memorial memorial himself. He drew inspiration from the memorial to the 253 dead of the United States Coast Guard ship USS "Serpens", which is located in the northern corner of Section 34 at Arlington National Cemetery. The "Serpens" memorial is octagonal in shape and lists the names of the dead on its side panels. The Victims of Terrorist Attack on the Pentagon Memorial is a pentagonal granite marker high. On five sides of the memorial along the top are inscribed the words "Victims of Terrorist Attack on the Pentagon September 11, 2001". Aluminum plaques, painted black, are inscribed with the names