Justin Einhorn, Associated Press

The country’s top-ranked team has not appeared at Memorial Stadium since Nebraska’s days as a national powerhouse. A big step in reclaiming that status would be to knock off the first No. 1 team playing there as a visitor in nearly 30 years. The last two programs to win back-to-back national championships square off when Southern California visits the 14th-ranked Cornhuskers on Saturday night… continue