For their home opener, the Lions hosted division rivals the Minnesota Vikings. The Lions struck first with a 30-yard Jason Hanson field goal in the first quarter. They went ahead 10-0 in the second quarter when Calvin Johnson caught an 8-yard TD pass from Matthew Stafford. The Vikings got on the board a few minutes later when Visanthe Shiancoe caught a 1-yard TD pass from Brett Favre.The third quarter was all Minnesota: first a  26-yard field goal by Ryan Longwell, then a 27-yard TD run by Adrian Peterson. The Vikings added to their lead in the fourth quarter with another field goal, this one from 46 yards out; then a 3-yard TD catch by Percy Harvin. The Lions got their only points of the second half with a 48-yard field goal.With their 19th straight regular season loss, the Lions fell to 0-2.

How many points did the Vikings score in the fourth quarter?
10