U.S. general says he 's seen private security contractors overreact . Pentagon secretary says he wants closer oversight of Defense contractors in U.S. . Iraqi officials upset after civilians killed by Blackwater USA guards . Blackwater USA guards says its contractors were attacked .
U.S. general says he 's seen private security contractors overreact . Defense secretary says he wants closer oversight of Pentagon contractors in Iraq . Iraqi officials upset after civilians killed by Blackwater USA guards . Blackwater says its contractors were attacked .