What was the reason behind making it a permanent law is 1966?

In 1966, the U.S. Congress passed the Freedom of Information Act (FOIA) as a permanent law to enhance transparency and promote government accountability. The move was largely motivated by the public's demand for greater access to government information, particularly in the wake of events like the Vietnam War and civil rights movements, which highlighted the need for more openness. By establishing FOIA, lawmakers aimed to empower citizens, encourage informed public participation, and foster trust in government institutions.