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look at this wall of condolences and look at some of these messages, "jail those responsible." >> this is an accident that never needed to happen. >> reporter: and questions for the building managers -- did the insulation and exterior cladding, recently installed, cause the fire to spread? and crucially, where else is that material used? an expert tells abc news that it is part of commercial construction in the united states, including new york city. tonight, sniffer dogs have been on a grim search for bodies in the tower behind me, parts of which still too unsafe for firefighters to enter, david. >> james, our thanks to you again tonight. and back in washington, d.c., criminal charges this evening against 16 people most of them turkish security agents after those rare images, they are accused in the violent assault on protesters outside the turkish ambassador's residence last month. nine people were injured. it was earlier that day, turkey's president erdogan was visiting the white house.