I couldn't have said it better
Bend but don't break: To illustrate this point, I'd like to look at Dallas' last two games. The 562 yards Dallas gave up against New Orleans were the most since they yielded 583 yards to the Houston Oilers' run-and-shoot back in in 1991. The Saints averaged 8.41 yards per passing attempt. But wait; one week earlier, the Steelers offense passed even more successfully, at an 8.47 clip. The key difference was that the Cowboys couldn't get New Orleans off the field; the Saints converted eleven third downs. Pittsburgh, on the other hand, converted only five third down opportunities. Although they move the ball rather easily, the Steelers had drives of 21, 36 and 37 yards fizzle out when various Cowboys, from DeMarcus Ware to Alex Albright, make key third down plays. If they are to beat Washington, Dallas will need individual players to step up on third downs.