NEW : President Bush says he and first lady are deeply saddened by the tragedy . Mine Safety and Health Administration chief : " The president is very concerned about this accident, as well as all of our other investigations into mine safety in America." The six men have been trapped underground since August 6 . Seven bore holes drilled into the mountain have found no signs of life .
NEW : President Bush says he and first lady are deeply saddened by the tragedy . Mine Safety and Health Administration chief : We 've run out of options . The six men have been trapped underground since August 6 . Seven bore holes drilled into the mountain have found no signs of life .