Answer based on context:

Coming off a huge divisional win over the Eagles, the Cowboys flew to Lambeau Field for a Week 10 duel with the Green Bay Packers.  After a scoreless first quarter, the Packers would acquire the only points of the opening half as kicker Mason Crosby booted a 48-yard field goal.  After a scoreless third quarter, Green Bay would extend their lead in the fourth quarter as quarterback Aaron Rodgers got a 1-yard touchdown run and threw a 2-yard touchdown pass to tight end Spencer Havner.  Dallas tried to rally as quarterback Tony Romo hooked up with wide receiver Roy Williams on a 9-yard touchdown pass, but the Packers' defense would shut down any further attempt. In this game, the Cowboys avoided a shutout in the final minutes. Their previous shutout was in 2003 against the New England Patriots in which they lost 12-0.

How many touchdowns were scored in the first half?
0