It was put out Communication that the gas helmets of the division were of inferior manufacture , to allay Cause_change_of_position_on_a_scale doubts as to the effectiveness of the helmet .

The economy declined Agree_or_refuse_to_act , with Granada 's once world-famous porcelain manufacture disrupted Hindering and challenged Confronting_problem by the Christian town of Manises near Valencia , in Aragon .

The NTSB , which had jurisdiction based on Boeing 's manufacture of the aircraft in the United States , investigated Criminal_investigation the crash Catastrophe under lead investigator Greg Feith .