The Redskins stayed at home for an NFC East game with the Philadelphia Eagles on Monday night.  Washington trailed early in the first quarter as Eagles wide receiver DeSean Jackson got a 67-yard touchdown run, followed by linebacker Will Witherspoon returning an interception 9 yards for a touchdown.  In the second quarter, Philadelphia increased their lead with kicker David Akers completed a 47-yard field goal.  Washington scored with quarterback Jason Campbell completing a 2-yard touchdown pass to wide receiver Devin Thomas, but the Eagles countered with a 44-yard field goal and a Jackson 57-yard touchdown pass reception.  The Redskins would then end the half with kicker Shaun Suisham making a 47-yard field goal.  Washington scored on Campbell's 1-yard touchdown pass to tight end Fred Davis in the fourth quarter. With the loss, the Redskins went into their bye week at 2-5.
How many yards difference exists between David Akers's longest and shortest field goal? ?
3