More Videos: www.bauforum24.tv Safety and security are major concerns in the mining and extraction industry. Liebherr has new approaches to these concerns. The human factor still plays a major role. At Minexpo 2012, in Las Vegas, Liebherr presents its aptly-named 'Fatigue Monitoring System'. Bernd Haase of Liebherr Newport News USA tells Bauforum24 TV about how Liebherr addresses accident prevention.