Coming off their road win over the Panthers, the Bengals flew to Cleveland Browns Stadium for their Week 4 AFC North duel with the Cleveland Browns in Round 1 of 2010's Battle of Ohio.  Cincinnati would trail early in the first quarter as Browns kicker Phil Dawson made a 30-yard field goal.  Cleveland would add onto their lead in the second quarter as quarterback Seneca Wallace completed a 24-yard touchdown pass to tight end Evan Moore.  Afterwards, the Bengals tied the game as kicker Mike Nugent got a 24-yard field goal, followed by quarterback Carson Palmer completing a 78-yard touchdown pass to wide receiver Terrell Owens.  The Browns would close out the half with Dawson getting a 31-yard field goal. In the third quarter, Cleveland responded with running back Peyton Hillis' 1-yard touchdown run, followed by Dawson nailing a 22-yard field goal.  Afterwards, Cincinnati came right back with Nugent's 25-yard field goal.  The Bengals tried to rally in the fourth quarter as Palmer found running back Brian Leonard on a 3-yard touchdown pass, but the Browns' defense would prevent any further progress. With the loss, not only did Cincinnati fall to 2-2.  The Browns also improve to 1-3 and prevented the Bengals from a 9th straight division rival win.
Answer this question: How many touchdowns did Carson Palmer throw?
2