What documentation and sources can be used to verify that the Wright brothers were truly the first to achieve controlled and sustained flight? Objective The student will be able to: a) cite sources that validate an argument, b) use appropriate citation for sources used during their argument development, c) present a convincing argument in a clear and concise manner that validates an argument. Background In recent years an argument has commenced that the Wright brothers were not the first to achieve to flight. The following website gives additional information about the rivalry between Langley Duration: 60 Minutes.