Factual errors: When Ian's gang is seeking access to the Archives by entering the utility tunnel in the street beneath their van, one man with two hooks and a chain easily lifts the utility grate from the street by himself. The grate also is shown to be very thin gage metal and sounds it as it is removed. Any utility grates and castings placed in traffic are normally very heavy so as to be structurally sound under traffic loads. There would be no way for a man to easily lift such a grate in the manner he did, nor would such a light duty grate be placed in traffic.
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