 PLOT: SPOILER: As Ben Gates is stealing the Declaration he is  confronted by a surprised Ian as though he did not expect him. Why  would Ian and his men be down in the preservation room hallway  without knowing that Riley had triggered the temperature sensor and  caused the Declaration to be taken down there? Otherwise the true  Declaration would have been on the main level for the benefit to be  viewed, and that would be a most inopportune time for a smash and  grab like it shows Ian preparing for as there would be additional  security and many more witnesses than usual.