The Tear Drop Monument was donated by the Russian people in tribute to those lost on 9/11. The names of those lost are inscribed in the base similar to the Vietnam Wall in DC. The walkway is lined with stones donated by those in remembrance of this day. The site is directly across from the Statue of Liberty, and looking at that skyline, you truly do see what's missing.
Although since 1996 there have been several improvements to technology, in 2012 alone ten people perished on Mount Everest. This reveals that even with ongoing development in climbing and safety technology, Everest is one of the most dangerous and unforgiving places on Earth.