HIGHLIGHTS: Cowboys beat down Washington for historic 56-14 win

ARLINGTON, Texas (KXAN) — The Dallas Cowboys scored touchdowns on offense, defense and special teams to set off a historic beatdown of rival Washington Sunday night.Already the owners of a playoff spot and the NFC East division crown, the Cowboys' 56-14 win over Washington was the largest margin of victory in the history of the rivalry.Dallas clinched the NFC East after Las Vegas' win over Denver earlier Sunday. The Cowboys clinched a playoff spot Thursday night, following San Francisco's