kaft sullenberger, did you want to add a comment to that? >> i certainly do. sms and fatigue risk management systems are important, but they are additional layers, additional safeguards. what we need to do is close the loophole. solve the fundamental problem, ensure that the cargo carriers have to build schedules that comply with federal aviation regulation 117 which is the fatigue rule that the passenger airlines have to comply with and not try to fix it later with, quite frankly a band-aid approach. we need to solve the problem. fatigue is fatigue whether you're carrying passengers or packages. >> and maintenance? >> and maintenance. >> okay. thank you. >> thank you. >> thank you madam chair. >> thank you. i would like to call on senator peters. >> thank you, madam chair, and thank you ranking member cantwell for holding this hearing and certainly it's been a fascinating hearing and enjoyed the conversation from our panelists. i know there's been quite a bit of discussion on the required hours and pilot experience prior to being a co-pilot so i wanted to exp