Although widespread rebuilding in the hard-hit New York metro region from Super Storm Sandy has not yet begun, NJIT Assistant Professor Mohamed Mahgoub, PhD, PE, says when the hammers start swinging, it's time to look at autoclaved aerated concrete.  The material, best known as AAC, has been heralded as the building material of the new millennium.  It's a lightweight, easily-crafted manufactured stone, strong enough to withstand earthquakes and hurricanes when reinforced with steel.  >>