again ... certainly if they had followed the recommendations in my report, the F28 crash at LaGuardia could have been averted." Another investigator into the Air Ontario accident told the documentary, "after all of this work [investigating the Dryden crash], after all of the efforts, to see it happen again was extremely frustrating." The documentary focused largely on these allegations, while also reconstructing the Air Ontario flight and the USAir flight. The FAA rejected Moshansky's allegations, and they claim that they never received his report. International Conference on Airplane Ground Deicing Following the crash of Flight 405 and the Air Ontario accident in Dryden, the FAA began to research methods of improving deicing practices at airports to minimise the number of accidents caused by a buildup of ice. Described by the FAA as a "sharply focused effort", experts convened on May 28 and 29, 1992, in Reston, Virginia for the International Conference on Ground Deicing. At the conference, industry methods were discussed and agreed upon for actions that should be taken in the long and short terms. A report on the conference by the FAA read: A better understanding of airplane ground deicing and anti-icing issues is a crucial prerequisite to the implementation of feasible and effective safety improvements. To achieve this goal, the FAA sponsored a conference at which the international aviation community could exchange thoughts and offer recommendation on a variety of issues concerning safe winter operations. [At the conference] more than 750 participants discussed the problems posed by aircraft deicing and examined possible solutions. Discussions over different types of deicing fluid reportedly were held, along with different deicing equipment and techniques. They also found that the pilot in command was the ultimate authority for takeoff decisions, but that all operators had to provide proper training and criteria for the pilot in command on which to base a proper decision. The conference concluded with an amendment to FAA regulations under which air carriers operate. The new regulations stated that airlines should put in place FAA-approved ground deicing or anti-icing procedures anytime weather conditions of ice, snow, or frost prevailed. The new rules went into effect on November 1, 1992. Developments in deicing In the years that followed the accident, airlines started using type IV deicing fluid, which is more effective than both types I and II. Type IV fluids stick to aircraft for up to two hours. Chicago