<Li> The National Transportation Safety Board (NTSB) investigates all aviation accidents in the United States, and certain major railroad and other accidents . </Li> <Li> The Nuclear Regulatory Commission (NRC) was established by the Energy Reorganization Act of 1974 from the United States Atomic Energy Commission, and was first opened January 19, 1975 . The NRC oversees reactor safety and security, reactor licensing and renewal, radioactive material safety, and spent fuel management (storage, security, recycling, and disposal). </Li> <Li> The National Science Foundation (NSF) is a United States government agency that supports fundamental research and education in all the non-medical fields of science and engineering . </Li> <Li> The Postal Regulatory Commission (PRC) was created in 1971 as the Postal Rate Commission and strengthened under the Postal Accountability and Enhancement Act enacted in December 2006 . Provides regulatory oversight over the activities of the United States Postal Service . </Li>

What are attempts to influence the attainment of appointed government office