would also regulate children's television substantially. All broadcast television stations would be required to air three hours of educational and informative ("E/I") children's programming on a weekly basis. With a few exceptions; however, the weekday cartoons were then not considered to meet the requirements set by the federal mandates. The Federal Communications Commission also placed new regulations on advertising content, making selling commercial time during entertainment-based children's programming difficult on over-the-air stations (cable channels, in comparison, would not face the same stringent regulations). The decline of the weekday cartoons began in 1997, as the FCC's new regulations on children's programming resulted in complaints from local stations regarding the ability to make airing cartoons financially viable. Regardless of the new regulations, UPN attempted to run a teen sitcom block in 1997. It only lasted one year. Warner Bros. would stop syndicating its vintage theatrical and made-for-TV cartoons to local stations that year, relegating them to cable television. The WB, though, continued to air the Kids' WB block and commissioned the daily cartoon Histeria! to meet the E/I guidelines. Starting in 1998, some UPN- and WB-affiliated stations would scale back their reliance on syndicated cartoons in morning timeslots in favor of airing family sitcoms, weekday morning local newscasts, and/or court, talk or reality series; many Fox affiliates also started running morning newscasts around this time. The Disney Afternoon ended its run in syndication, in September 1999. Disney would then enter into a time-lease agreement with UPN, replacing the UPN Kids block (which debuted in 1995) with Disney's One Too. Disney's One Saturday Morning was on from 1997 until 2002. Still, there was a decent number of cartoons that were available in syndication in the 1990s. And in 1999, Fox Kids trimmed its weekday block to two hours while adding The Magic School Bus, which occupied an hour of the lineup to meet the E/I quotas for its local stations. 2000s Beginning in 2000, an increasing number of television stations stopped airing cartoons on weekday mornings and/or afternoons. By now, UPN's stations mainly ran cartoons through the Disney's One Too block. Some WB and UPN stations continued running an hour or so of syndicated cartoons each weekday. Fox affiliates for the most part had used the morning time period to run local newscasts or infomercials and only ran children's programs during the afternoon hours. Some Fox affiliates began dropping the afternoon block; in