How long was the longest drive in NFL history?

How long was the longest drive in NFL history? On Thanksgiving Day, 1997, the Tennessee Oilers had a 21-play, 90-yard drive against the Dallas Cowboys that ended in a 19-yard Al Del Greco field goal after a ton of rushing attempts and a handful of passes (it was the most Jeff Fisher drive ever) had the Oilers stumped at the Dallas one-yard line.

On Thanksgiving Day, 1997, the Tennessee Oilers had a 21-play, 90-yard drive against the Dallas Cowboys that ended in a 19-yard Al Del Greco field goal after a ton of rushing attempts and a handful of passes (it was the most Jeff Fisher drive ever) had the Oilers stumped at the Dallas one-yard line.