College football officials in most major conferences reversed their decisions to play games Saturday in the wake of Tuesday's terrorist attacks on the United States. On the heels of the NFL's decision Thursday to call off its Week 2 schedule, all Division I-A games have been postponed.

Two of the biggest factors in the reversal were the the decision of the rest of the sports world -- most prominently the NFL -- to postpone their games and the logistical problems in trying to get teams and personnel to game locations.

SEC school presidents were among those to change their minds Thursday, and their teams will not play football games this weekend. One of the most anticipated matchups of the year -- Tennessee vs. Florida -- will not take place, at least not on Saturday.

"In obviously what is one of the toughest times in American history, decisions are very, very tough to make," LSU athletics director Skip Bertman said. "We support the Southeastern Conference's decision to not play and we hope to make this game up at a later date."

Plans for a makeup date for the LSU-Auburn game have yet to be determined. Fans are asked to hold on to their tickets until further details about the game are announced.

Vanderbilt-Ole Miss was among the other SEC games postponed on Thursday. The Bowling Green at South Carolina game was postponed earlier because Bowling Green couldn't guarantee that it could travel.

The Western Athletic Conference was the first to alter its plans on Thursday by postponing four games involving its teams. The Big 12, MAC and MWC all followed by announcing they would also postpone their teams' games.

WAC commissioner Karl Benson told ESPN.com that the four games -- Tulsa at Big 12 member Oklahoma, Louisiana Tech at Big 12 Kansas State, the Big West's Utah State at Fresno State and the Big 12's Texas Tech at UTEP -- were all postponed. The Utah St.-Freno St. game was rescheduled for Dec. 1.

Other WAC teams -- SMU at North Carolina, Central Michigan at Boise State, Rice at Nebraska and Hawaii at Nevada -- had their games postponed earlier, on Wednesday.

The change in opinion came after an emergency call with the WAC's board of directors Thursday morning.

Other Saturday games recently postponed in a change of heart are Kentucky at Indiana, Louisville-Illinois and Western Kentucky-Wisconsin.

"Our original decision to host the football game on Sept. 15 was based on the best information available at the time. As we've moved into uncharted waters of a very difficult situation, the event we were planning to hold to help unify the communities was not possible," Illinois athletic director Ron Guenther said in a statement Thursday.

Louisville coach John L. Smith begged to differ, however.

"I don't think it's a good idea," Smith told the Louisville Courier-Journal. "I thought it was a good idea to play the game. We've got to get back to some normalcy. That's what people are calling for ... When you get hit in the gut and go down on the field, you've got to climb your way up and not let them know you've been hurt. We've let them know we've been hurt. "Don't let somebody bring us to our knees and say, 'Yeah we hurt them.' That's what they're looking for. Are we going to shut down the whole country?"

The Sun Belt also reconsidered on some games, with Louisiana-Lafayette at Central Florida and New Mexico State-New Mexico both postponed to Nov. 24, and Louisiana-Monroe at Cincinnati postponed indefinitely.

The Arizona State-UCLA Pac-10 game that had been scheduled Saturday night at the Rose Bowl will be played Dec. 1. The game was postponed Tuesday afternoon.

Oregon State added Northern Arizona to its schedule Friday, replacing this Saturday's home game with Montana State that was canceled. The Beavers will play Northern Arizona on Nov. 17, at a time to be announced.

With the best chance of making these game up coming in late November and early December, what this all could mean is that more teams won't complete their seasons until well into December. That in turn could alter the schedule of announcements and bowl pairings from the Bowl Championship Series.

"We've begun to receive questions as to the ramifications to the BCS from the various schedule changes which are currently in progress as a result of Saturday's postponements and cancellations," said John Swofford, the BCS coordinator. "In the next week to 10 days, once the scheduling issues are settled, we will address those changes and any implications they have on the BCS."

Information from the Associated Press was used in this report.