Construction site videos

Improve your English with these videos. Train, listen and repeat.
1) Easy lesson  A construction site
http://www.youtube.com/watch?v=TiTTras9pLE&list=PLozkjIPMgGf_U7k28tYghDrfxIOAHk7I2

2) Another easy lesson: This vocabulary lesson teaches students about jobs / professions in construction. Students learn the names of professions (e.g. plumber, electrician) and verbs to describe what construction professionals do.
 http://www.youtube.com/watch?v=nhFIBuk3YYg

3) Now, more technical and more difficult: BEAM ONE
It is the technical description speaking of distributing forces, cross sections and so on.
http://www.youtube.com/watch?v=vK7yYVH_uXM#t=28

Great thanks to the authors.

Powerful Wind

Safety rules must be enforced and respected.
Or lives will be taken.
I'm not talking about the "credible terror threat" about two packages and four planes that is happening live on CBS.
No, no, I'm talking about safety rules and this guy's actual tragic death:

Prepare an oral about it for a two-point bonus!"
http://www.cbsnews.com/video/watch/?id=6999291n&tag=related;photovideo