9/11: How the twin towers were built

Designed by architect Minoru Yamasaki, the giant towers were conceived as part of an urban renewal project for Lower Manhattan - and when completed in the early 1970s, for a short time at least, were the world's tallest buildings.

The 110-storey landmarks that dominated the Manhattan skyline for nearly 30 years were reduced to rubble in the 9/11 suicide attacks of 2001. Thousands of people in the World Trade Center, and on the planes that crashed into them, lost their lives.
Now - a decade since they were lost, and with new construction on the site well-advanced - take a look back at the life of New York's twin towers.

Watch the video in the link given below: