Documentary on World trade Center

Hi, students,

I´ve found interesting things on the net about the collapse of World Trade Center. There is some vocabulary related to your area of study. The first video is a documentary and the second one is an interview with the lead investigator for the U.S. team that studied the Twin Towers’ collapse. This material make us think "What really happened in September 11?" 

http://video.cpt12.org/video/2270078138

http://www.pbs.org/wgbh/nova/tech/debunking-9-11-bomb-theories.html

Before watching the video look up for words such as 

beam:

steel:

frame:



your teacher