lost money; networks mainly scheduled public affairs programs in prime time in order to bolster the prestige of their news departments, and thus boost ratings for the regular evening newscasts, which were seen by far more people than documentaries and the like. 60 Minutes struggled under that stigma during its first three years. Changes to 60 Minutes came fairly early in the program's history. When Reasoner left CBS to co-anchor ABC's evening newscast (he would return to CBS and 60 Minutes in 1978), Morley Safer joined the team in 1970, and he took over Reasoner's duties of reporting less aggressive stories. However, when Richard Nixon began targeting press access and reporting, even Safer, formerly the CBS News bureau chief in Saigon and London, began to do "hard" investigative reports, and during the 1970–71 season alone, 60 Minutes reported on cluster bombs, the South Vietnamese Army, draft dodgers, Nigeria, the Middle East, and Northern Ireland. Effects from the Prime Time Access Rule By 1971, the Federal Communications Commission (FCC) introduced the Prime Time Access Rule, which freed local network affiliates in the top 50 markets (in practice, the entire network) to take a half-hour of prime time from the networks on Mondays through Saturdays and one full hour on Sundays. Because nearly all affiliates found production costs for the FCC's intended goal of increased public affairs programming very high and the ratings (and by association, advertising revenues) low, making it mostly unprofitable, the FCC created an exception for network-authored news and public affairs shows. After a six-month hiatus in late 1971, CBS found a prime place for 60 Minutes in a portion of that displaced time, 6:00 p.m. to 7:00 p.m. Eastern (5:00 p.m. to 6:00 p.m. Central Time) on Sundays in January 1972. This proved somewhat less than satisfactory, however, because in order to accommodate CBS' telecasts of late afternoon National Football League (NFL) football games, 60 Minutes went on hiatus during the fall from 1972 to 1975 (and the summer of 1972). This took place because football telecasts were protected contractually from interruptions in the wake of the infamous "Heidi Bowl" incident on NBC in November 1968. Despite the irregular scheduling, the program's hard-hitting reports attracted a steadily growing audience, particularly during the waning days of the Vietnam War and the gripping events of the Watergate scandal; at that time, few if any other major network news shows did