Coming off their win over the Broncos, the Redskins flew to Cowboys Stadium for their Week 11 NFC East rivalry match against the Dallas Cowboys. After a scoreless first quarter, Washington would strike in the second quarter as kicker Shaun Suisham nailed a 45-yard field goal.  The Redskins would add onto their lead in the third quarter with Suisham booting a 31-yard field goal.  However, in the fourth quarter, the Cowboys rallied as quarterback Tony Romo completing a 10-yard touchdown pass to wide receiver Patrick Crayton.
How many points was Washington leading by at halftime?
3