An essential safety element of modern heavy industry, the hard hat has also evolved into something of a symbol of both engineering, and blue-collar industry. Version française : • Sécurité d'abord! l'histoire du Casqu... The hat I wear in this video comes from Amazon.com Title sequence designed by Alexandre Mahler am.design@live.com This video was done for entertainment and educational purposes. No copyright infringement of any sort was intended.
