A sunrise aerial view of One World Trade Center and 9/11 Memorial Plaza on November 01, 2016 in New York City. Ground Zero will once again play host to a remembrance ceremony in the heat ...

The satellite captured large plumes of smoke rising into the skies above Manhattan on Sept. 12, 2001, after the Twin Towers collapsed. A few days later, IKONOS snapped another view of Ground Zero ...

But compared to the situation at the end of September, when aerial thermal images showed the whole of Ground Zero to be a hot spot, conditions today are much safer for the workers clearing the rubble.