Cobras (DOCUMENTÁRIO)

http://www.youtube.com/watch?v=USzQ8H4MXYc
http://www.youtube.com/watch?v=84vWENdwBrg
http://www.youtube.com/watch?v=d5vNDTDWhjY
http://www.youtube.com/watch?v=yQLAz7Zobho
http://www.youtube.com/watch?v=Do1SuEKHrws
http://www.youtube.com/watch?v=5jGmjw6XZvw
http://www.youtube.com/watch?v=1xGd4NRP06I