The new action brings to 28 million the number of Takata air bag inflators recalled and increases the number of vehicles affected in the United States to as many as 24 million, the National Highway Traffic Safety Administration (NHTSA) said. Friday’s move was prompted in part by the death of the driver of a Ford Motor Co pickup truck last month, as well as new tests conducted on suspected faulty air bags. “This is a massive safety crisis,” NHTSA spokesman Gordon Trowbridge told reporters.