Federal aviation regulators have grounded New York Helicopter Tours after its director of operations was fired shortly after initiating a temporary flight suspension. The FAA suspects retaliation, raising serious safety concerns. The crash on Thursday claimed six lives, including five Spanish tourists and pilot Seankese Johnson. Investigations by the FAA and NTSB found that key helicopter components were recovered from the Hudson River, which will aid in determining the cause of the accident. The crash has sparked intense discussions on aviation safety and regulations surrounding helicopter tours.