The Redskins played the Lions in Detroit.  Washington trailed early when Lions quarterback Matthew Stafford completed a 21-yard touchdown pass to wide receiver Bryant Johnson.  Detroit increased their lead when kicker Jason Hanson completed 39-yard and 26-yard field goals. The Redskins scored in the third quarter as quarterback Jason Campbell completed a 57-yard touchdown pass to wide receiver Santana Moss.  In the fourth quarter Lions' running back Maurice Morris got a 2-yard touchdown run. Subsequently, the Lions failed a 2-point conversion attempt.  Campbell completed a 4-yard touchdown pass to running back Rock Cartwright late in the game, although the Redskins would ultimately lose. The Lions snapped a 19-game regular season losing streak with the win.
Question: How many yards was the shortest touchdown of the game?
Answer: 2