Answer based on context:

The Giants got their sixth straight win with a rain-soaked 13-10 victory over the winless Miami Dolphins in the first International Series game, held at England's Wembley Stadium. Persistent rain throughout the day had soaked the field and hurt both teams on offense as the field was torn up for most of the afternoon, but the Giants survived to get to 6-2 on the season as they headed for their bye week. After a missed Miami field goal on the opening drive of the game, the Giants traveled down the field, mixing up a combination of run and pass. Brandon Jacobs had a big day, running in the rain for 131 yards on 23 carries.  Eli Manning, who threw for only 59 yards in the game, missed a wide open Amani Toomer in the end zone from inside the five, and the Giants had to settle for a 20-yard field goal from Lawrence Tynes. The Giants extended their lead to 10 with a 14-play, 69-yard drive in the second quarter. Jacobs and Reuben Droughns ran heavily on the drive and Eli Manning evaded the Dolphins defense, scrambling 10 yards for the game's first touchdown.  After a Cleo Lemon fumble, which was recovered by Michael Strahan, the Giants stretched the lead to 13 at the half with a 41-yard kick from Tynes. In the third quarter, after recovering a Manning fumble, the Dolphins drove the ball down inside the Giants 5. However, a Lemon muffed snap forced the Dolphins to kick a field goal. The Giants continued to run well with Jacobs, and had a chance to tack on 3 more points but Tynes missed badly on a 29-yard field goal. In the final two minutes, the Dolphins scored their first touchdown with Ted Ginn Jr's first ever NFL touchdown reception. An attempted onside kick from Jay Feely skidded off the wet surface straight out of bounds, enabling the Giants to run out the clock for the win. For the day, Jacobs ran for his career-high 131 yards, and Fred Robbins and Kawika Mitchell recorded sacks. The Giants have won six in a row for the first time since 1994. Eli Manning scored the NFL's first regular season touchdown outside of North America. With their sixth-straight win, the Giants entered their bye week at 6-2.

How many touchdowns were scored in the first half?
1