Original sentence: The investigation could not include physical evidence as the materials from the building lacked characteristics allowing them to be positively identified and were therefore disposed of prior to the initiation of the investigation
Edited sentence: Although the water pressure was too low to fight the fire, fireboats were available on the Hudson River  just a quarter mile away to pump water in support of land based systems.Once it was removed from the scene, the steel from WTC 7 could not be clearly identified.The investigation could not include physical evidence since the remains of all WTC-7 buildings were removed before congressional action and funding was available for this Investigation to begin.This therefore  raises questions why there was no attempt to fight the fire.Unlike the pieces of steel from WTC 1 and WTC 2, which were painted red and contained distinguishing markings, WTC 7 steel did not contain such identifying characteristics