Context: In Week 7, the Saints traveled to South Florida to continue their interconference series against the Dolphins. Miami jumped out to a 24-3 lead by the second quarter, with former Saint first-rounder and Heisman winner Ricky Williams scoring on runs of 4 and 68 yards, and Ronnie Brown added a touchdown run of 8 yards in the second quarter. Despite being behind for the first time in the season, the Saints gained momentum when Drew Brees scored on a quarterback sneak to end the first half and cap a 1:36 drive of 51 yards.In the second half, the Saints scored on a 42-yard interception return by Darren Sharper in the third, but Dan Carpenter added a second field goal to push the lead back to ten points. The Saints responded with a 10-yard Brees-Colston connection, but Ricky Williams answered with another 4-yard rushing score to make the score 34-24. The Saints completed their comeback in the fourth quarter, first with Reggie Bush scoring on a reverse from 10 yards out, then with Brees scoring his second rush TD from 2. Though John Carney missed the extra point, he later hit a field goal from 20 yards, and Tracy Porter sealed the comeback with a 54-yard interception return. The Saints outscored Miami 22-0 in the fourth quarter, and 36-10 for the second half.

Question: How many yards was the longest running touchdown?

Answer:
68