Explore the World Trade Center site
This picture by Mark Lennihan/AP was taken in March 2011.
Britons who lived in Saudi Arabia tell of its covert drinking culture, and how ex pats brew their own alcohol and even hold brewing competitions.
On Ada Lovelace Day, four female engineers from around the world share their experiences of working in male-dominated professions.
It's illegal to use them on UK public roads, but "rideables" are on the rise.
Author Salman Rushdie calls out extreme Modi supporters and dubs them "Modi Toadies".