Helena has a new photographic theme for 2016:
Snap, a visually linked group of 2 to 4 images.
The 9/11 Museum in Lower Manhattan
is humbling, emotional and truly inspiring in equal measure.
Most of the museum is underground and under the
actual footprints of the Twin Towers.
The external access of these stairs saved scores of lives
that day in September 2001. They survived reasonably intact;
the damage you can see occurred during the clean-up operation.
This steel girder was the last thing removed from the World Trade Centre site.
The city's police and fire departments were invited to add their company details,
and relatives of the dead were able to write memories of their loved ones on there.
You can see more Snap images here.