There will no doubt be a number totally vaporized, others shredded. Does anyone have the figure on how many people in NY in 911 were never identified, and how many were only identified by DNA testing. People dead in apartments might be identifiable with DNA even if not visually intact. Much harder within the warehouses themselves although they will have lists of people scheduled to work that night. Right now the figure is 17, certainly several hundred is likely.
Ouch.