Read this article and answer this question Hoping to rebound from their road loss to the Panthers, the Seahawks went home for a Week 16 interconference duel with the Baltimore Ravens.  After a scoreless first quarter, the Seahawks took flight in the second quarter with QB Matt Hasselbeck completing a 21-yard TD pass to WR Nate Burleson, along with LB Leroy Hill returning a fumble 20 yards for a touchdown, and Hasselbeck completing a 14-yard TD pass to RB Shaun Alexander. In the third quarter, Seattle increased its lead with kicker Josh Brown nailing a 42-yard and a 39-yard field goal.  In the fourth quarter, the Ravens would get their only score of the period as QB Troy Smith completed a 79-yard TD pass to WR Derrick Mason.
How many of Hasselbeck's TD passes were made in the first half?
2