© 2012 HowStuffWorks.com
The materials used to build the World Trade Center's twin towers have been heavily scrutinized since the 9/11 terrorist attacks -- including the steel that formed the frames of the skyscrapers.
Created for social purposes, it’s meant to act as a virtual presence, helping keep far-off relatives and late-working parents connected to their families. What is it? A robot called the ConnectR.