In week 14, the Lions hosted a rematch with their NFC North rivals the Minnesota Vikings. The Lions took an early lead which they never gave back after Vikings quarterback Christian Ponder fumbled the ball on the Vikings' first offensive play of the game and Stephen Tulloch picked it up in the end zone for a touchdown. The Lions added more points when Titus Young caught a Matthew Stafford pass and ran it in 57 yards for a TD, and added another seven when Brandon Pettigrew caught a 12-yard pass. The Vikings got on the board late in the first quarter when Visanthe Shiancoe caught a seven-yard pass from Ponder. In the second quarter, Detroit's defense scored again when Alphonso Smith intercepted a Ponder pass and ran it back 30 yards for a TD. Minnesota responded when Percy Harvin caught a six-yard touchdown pass. The Lions scored the final points of the first half when Jason Hanson kicked a 30-yard field goal. This was their first 31-point first half since 1985. After halftime, Vikings backup quarterback Joe Webb came into the game and ran in a touchdown himself from 65 yards out. In the fourth quarter, the Lions scored their only points of the second half when Hanson kicked his second field goal of the game, this one from 26 yards out. Minnesota responded with a two-yard TD catch by Toby Gerhart. After a defensive stop, the Vikings attempted a late comeback when they drove down the field in the final minute of the game, but Webb fumbled the ball after being sacked by DeAndre Levy on first and goal with nine seconds left, evading a facemask call, but handing the Lions the victory.

Answer this question based on the article: How many times did the Lions defense score?
Detroit's defense scored again