Coming off their Sunday Night divisional home win over the Bengals, the Steelers flew to Gillette Stadium for a Week 14 intraconference duel with the undefeated New England Patriots.  In the first quarter, Pittsburgh struck first with kicker Jeff Reed getting a 23-yard field goal.  Afterwards, the Patriots took the lead with QB Tom Brady completing a 4-yard TD pass to WR Randy Moss.  In the second quarter, New England increased their lead with Brady and Moss hooking up with each other again on a 63-yard TD pass.  Afterwards, the Steelers responded with QB Ben Roethlisberger completing a 32-yard TD pass to RB Najeh Davenport, along with Reed kicking a 44-yard field goal.  New England would end the half with kicker Stephen Gostkowski getting a 42-yard field goal. In the third quarter, the Patriots took control as Brady lateraled to Moss, who lateraled back to Brady, and then threw a 56-yard TD pass to WR Jabar Gaffney.  Afterwards, New England increased its lead with Brady completing a 2-yard TD pass to WR Wes Welker.  In the fourth quarter, the Patriots sealed the win with Gostkowski nailing a 28-yard field goal. The loss also made the Steelers' road record fall to 2-4.
Question: How many yards was the shortest touchdown pass?
Answer: 2