When the roofer pulled back the rubber roofing, this is what he found!!  Look closely at the base of the chimney, absolutely no mortar joints to speak of.  The brick are already starting to collapse down, it was swaying as they removed the brick from the top of the chimney.  One good push & the chimney would have fallen 45' to the ground.  People don't worry about what they can't see.  To see most recently completed rebuild click here http://www.dmstorrschimney.com/our-soot-stories/chimney-complete-crown-somerville
More pictures to follow over the next couple of days.