An executive for Takata Corp., the company that produced faulty air bags linked to the deaths of motorists, apologized at a U.S. Senate hearing as two lawmakers told of a sixth fatality they say is also related. "We are deeply sorry and anguished about each of the reported instances in which a Takata air bag has not performed as designed and a driver or passenger has suffered personal injuries or death," Hiroshi Shimizu, senior vice president in charge of global quality assurance, said in testimony today to the Senate Committee on Commerce, Science and Transportation.